Moved every main function to a single file.

Added the ability for a benchmark initialisation function. Main and
initialise_benchmark are weakly linked so that individual benchmarks can
override them if necessary.

    * doc/beebs.info: Regenerated
    * doc/beebs.texi: Updated documentation to add a section on
        benchmarks
    * doc/version.texi: Regenerated
    * src/2dfir/Makefile.in: Regenerated
    * src/2dfir/fir2dim.c: Removed main function
    * src/adpcm/Makefile.in: Regenerated
    * src/adpcm/adpcm.c: Removed main function
    * src/aha-compress/Makefile.in: Regenerated
    * src/aha-compress/compress_test.c: Removed main function
    * src/aha-mont64/Makefile.in: Regenerated
    * src/aha-mont64/mont64.c: Removed main function
    * src/blowfish/Makefile.in: Regenerated
    * src/blowfish/bf.c: Removed main function
    * src/bs/Makefile.in: Regenerated
    * src/bs/bs.c: Removed main function
    * src/bubblesort/Makefile.in: Regenerated
    * src/bubblesort/bubblesort.c: Removed main function
    * src/cnt/Makefile.in: Regenerated
    * src/cnt/cnt.c: Removed main function
    * src/common.mk.am: Added main.c to platform sources so it gets
        compiled.
    * src/compress/Makefile.in: Regenerated
    * src/compress/compress.c: Removed main function
    * src/cover/Makefile.in: Regenerated
    * src/cover/cover.c: Removed main function
    * src/crc/Makefile.in: Regenerated
    * src/crc/crc.c: Removed main function
    * src/crc32/Makefile.in: Regenerated
    * src/crc32/crc_32.c: Removed main function
    * src/ctl-stack/Makefile.in: Regenerated
    * src/ctl-string/Makefile.in: Regenerated
    * src/ctl-string/string.c: Removed main function
    * src/ctl-vector/Makefile.in: Regenerated
    * src/ctl/ctl.c: Removed main function
    * src/cubic/Makefile.in: Regenerated
    * src/cubic/basicmath_small.c: Removed main function
    * src/cubic/cubic.c: Removed main function
    * src/dhrystone/Makefile.in: Regenerated
    * src/dhrystone/dhry_1.c: Removed main function
    * src/dijkstra/Makefile.in: Regenerated
    * src/dijkstra/dijkstra_small.c: Removed main function
    * src/dtoa/Makefile.in: Regenerated
    * src/dtoa/dtoa.c: Removed main function
    * src/duff/Makefile.in: Regenerated
    * src/duff/duff.c: Removed main function
    * src/edn/Makefile.in: Regenerated
    * src/edn/edn.c: Removed main function
    * src/expint/Makefile.in: Regenerated
    * src/expint/expint.c: Removed main function
    * src/fac/Makefile.in: Regenerated
    * src/fac/fac.c: Removed main function
    * src/fasta/Makefile.in: Regenerated
    * src/fasta/fasta.c: Removed main function
    * src/fdct/Makefile.in: Regenerated
    * src/fdct/fdct.c: Removed main function
    * src/fft/Makefile.in: Regenerated
    * src/fft/fft1.c: Removed main function
    * src/fibcall/Makefile.in: Regenerated
    * src/fibcall/fibcall.c: Removed main function
    * src/fir/Makefile.in: Regenerated
    * src/fir/fir.c: Removed main function
    * src/frac/Makefile.in: Regenerated
    * src/frac/frac.c: Removed main function
    * src/huffbench/Makefile.in: Regenerated
    * src/huffbench/huffbench.c: Removed main function
    * src/insertsort/Makefile.in: Regenerated
    * src/insertsort/insertsort.c: Removed main function
    * src/janne_complex/Makefile.in: Regenerated
    * src/janne_complex/janne_complex.c: Removed main function
    * src/jfdctint/Makefile.in: Regenerated
    * src/jfdctint/jfdctint.c: Removed main function
    * src/lcdnum/Makefile.in: Regenerated
    * src/lcdnum/lcdnum.c: Removed main function
    * src/levenshtein/Makefile.in: Regenerated
    * src/levenshtein/levenshtein.c: Removed main function
    * src/lms/Makefile.in: Regenerated
    * src/lms/lms.c: Removed main function
    * src/ludcmp/Makefile.in: Regenerated
    * src/ludcmp/ludcmp.c: Removed main function
    * src/main.c: Generic main function for all the benchmarks
    * src/matmult-float/Makefile.in: Regenerated
    * src/matmult-int/Makefile.in: Regenerated
    * src/matmult/matmult.c: Removed main function
    * src/mergesort/Makefile.in: Regenerated
    * src/mergesort/mergesort.c: Removed main function
    * src/miniz/Makefile.in: Regenerated
    * src/miniz/miniz_b.c: Removed main function
    * src/minver/Makefile.in: Regenerated
    * src/minver/minver.c: Removed main function
    * src/nbody/Makefile.in: Regenerated
    * src/nbody/nbody.c: Removed main function
    * src/ndes/Makefile.in: Regenerated
    * src/ndes/ndes.c: Removed main function
    * src/nettle-arcfour/Makefile.in: Regenerated
    * src/nettle-arcfour/arcfour.c: Removed main function
    * src/nettle-cast128/Makefile.in: Regenerated
    * src/nettle-cast128/cast128.c: Removed main function
    * src/nettle-des/Makefile.in: Regenerated
    * src/nettle-des/des.c: Removed main function
    * src/nettle-md5/Makefile.in: Regenerated
    * src/nettle-md5/md5.c: Removed main function
    * src/newlib-exp/Makefile.in: Regenerated
    * src/newlib-exp/ef_exp.c: Removed main function
    * src/newlib-log/Makefile.in: Regenerated
    * src/newlib-log/ef_log.c: Removed main function
    * src/newlib-mod/Makefile.in: Regenerated
    * src/newlib-mod/ef_mod.c: Removed main function
    * src/newlib-sqrt/Makefile.in: Regenerated
    * src/newlib-sqrt/ef_sqrt.c: Removed main function
    * src/ns/Makefile.in: Regenerated
    * src/ns/ns.c: Removed main function
    * src/nsichneu/Makefile.in: Regenerated
    * src/nsichneu/nsichneu.c: Removed main function
    * src/picojpeg/Makefile.in: Regenerated
    * src/picojpeg/picojpeg_test.c: Removed main function
    * src/prime/Makefile.in: Regenerated
    * src/prime/prime.c: Removed main function
    * src/qrduino/Makefile.in: Regenerated
    * src/qrduino/qrtest.c: Removed main function
    * src/qsort/Makefile.in: Regenerated
    * src/qsort/qsort.c: Removed main function
    * src/qurt/Makefile.in: Regenerated
    * src/qurt/qurt.c: Removed main function
    * src/recursion/Makefile.in: Regenerated
    * src/recursion/recursion.c: Removed main function
    * src/rijndael/Makefile.in: Regenerated
    * src/rijndael/aesxam.c: Removed main function
    * src/select/Makefile.in: Regenerated
    * src/select/select.c: Removed main function
    * src/sglib-arraybinsearch/Makefile.in: Regenerated
    * src/sglib-arraybinsearch/arraybinsearch.c: Removed main function
    * src/sglib-arrayheapsort/Makefile.in: Regenerated
    * src/sglib-arrayquicksort/Makefile.in: Regenerated
    * src/sglib-arraysort/arraysort.c: Removed main function
    * src/sglib-dllist/Makefile.in: Regenerated
    * src/sglib-dllist/dllist.c: Removed main function
    * src/sglib-hashtable/Makefile.in: Regenerated
    * src/sglib-hashtable/hashtable.c: Removed main function
    * src/sglib-listinsertsort/Makefile.in: Regenerated
    * src/sglib-listinsertsort/listinsertsort.c: Removed main function
    * src/sglib-listsort/Makefile.in: Regenerated
    * src/sglib-listsort/listsort.c: Removed main function
    * src/sglib-queue/Makefile.in: Regenerated
    * src/sglib-queue/queue.c: Removed main function
    * src/sglib-rbtree/Makefile.in: Regenerated
    * src/sglib-rbtree/rbtree.c: Removed main function
    * src/sha/Makefile.in: Regenerated
    * src/sha/sha_driver.c: Removed main function
    * src/slre/Makefile.in: Regenerated
    * src/slre/slre.c: Removed main function
    * src/sqrt/Makefile.in: Regenerated
    * src/sqrt/sqrt.c: Removed main function
    * src/st/Makefile.in: Regenerated
    * src/st/st.c: Removed main function
    * src/statemate/Makefile.in: Regenerated
    * src/statemate/statemate.c: Removed main function
    * src/stb_perlin/Makefile.in: Regenerated
    * src/stb_perlin/stb_perlin.c: Removed main function
    * src/stringsearch1/Makefile.in: Regenerated
    * src/stringsearch1/stringsearch1.c: Removed main function
    * src/strstr/Makefile.in: Regenerated
    * src/strstr/strstr.c: Removed main function
    * src/tarai/Makefile.in: Regenerated
    * src/tarai/tarai.c: Removed main function
    * src/template/Makefile.in: Regenerated
    * src/template/template.c: Removed main function
    * src/trio-snprintf/Makefile.in: Regenerated
    * src/trio-sscanf/Makefile.in: Regenerated
    * src/trio/trio_test.c: Removed main function
    * src/ud/Makefile.in: Regenerated
    * src/ud/ud.c: Removed main function
    * src/whetstone/Makefile.in: Regenerated
    * src/whetstone/whetstone.c: Removed main function
    * src/wikisort/Makefile.in: Regenerated
    * src/wikisort/wikisort.c: Removed main function