Add DejaGNU support to BEEBS.

This is a work in progress.

When building native, running `make check` will run the benchmarks on the host.
AVR is supported through avrdude, for example:

~~~
export AVRDUDE=/usr/bin/avrdude
export AVRDUDE_FLAGS="-carduino -patmega328p -P/dev/ttyUSB0 -D"
./configure --host=avr --with-chip=atmega328p --with-board=shrimp
make RUNTESTFLAGS="--target_board=atmega328p-shrimp" check
~~~

	* Makefile.am (AUTOMAKE_OPTIONS): Add dejagnu.
	(EXTRA_DEJAGNU_SITE_CONFIG): Add dejagnu/site.exp.
	(EXTRA_DIST): Include the dejagnu scripts in the distribution.
	* Makefile.in: Regenerate.
	* beebs.test/run.exp: New file. This is the main run script.
	* build-aux/compile: Import from automake.
	* config/default.exp: New file. Needed for running BEEBS native.
	* configure: Regenerate.
	* configure.ac: Add BENCHMARKS as a substitute.
	Add dejagnu/site.exp config file.
	* dejagnu/baseboards/avr-avrdude.exp: New board file for avrdude.
	* dejagnu/config/avrdude.exp: New config file for avrdude.
	* dejagnu/site.exp.in: New template for EXTRA_DEJAGNU_SITE_CONFIG.
	* src/2dfir/Makefile.in: Regenerate.
	* src/adpcm/Makefile.in: Regenerate.
	* src/blowfish/Makefile.in: Regenerate.
	* src/bs/Makefile.in: Regenerate.
	* src/bsort100/Makefile.in: Regenerate.
	* src/bubblesort/Makefile.in: Regenerate.
	* src/cnt/Makefile.in: Regenerate.
	* src/compress/Makefile.in: Regenerate.
	* src/cover/Makefile.in: Regenerate.
	* src/crc/Makefile.in: Regenerate.
	* src/crc32/Makefile.in: Regenerate.
	* src/ctl-stack/Makefile.in: Regenerate.
	* src/ctl-string/Makefile.in: Regenerate.
	* src/ctl-vector/Makefile.in: Regenerate.
	* src/cubic/Makefile.in: Regenerate.
	* src/dhrystone/Makefile.in: Regenerate.
	* src/dijkstra/Makefile.in: Regenerate.
	* src/dtoa/Makefile.in: Regenerate.
	* src/duff/Makefile.in: Regenerate.
	* src/edn/Makefile.in: Regenerate.
	* src/expint/Makefile.in: Regenerate.
	* src/fac/Makefile.in: Regenerate.
	* src/fasta/Makefile.in: Regenerate.
	* src/fdct/Makefile.in: Regenerate.
	* src/fft/Makefile.in: Regenerate.
	* src/fibcall/Makefile.in: Regenerate.
	* src/fir/Makefile.in: Regenerate.
	* src/float_matmult/Makefile.in: Regenerate.
	* src/frac/Makefile.in: Regenerate.
	* src/gdb-advance/Makefile.in: Regenerate.
	* src/gdb-all-types/Makefile.in: Regenerate.
	* src/gdb-anon/Makefile.in: Regenerate.
	* src/gdb-arrayidx/Makefile.in: Regenerate.
	* src/gdb-async/Makefile.in: Regenerate.
	* src/gdb-bitfields/Makefile.in: Regenerate.
	* src/gdb-constvars/Makefile.in: Regenerate.
	* src/gdb-store/Makefile.in: Regenerate.
	* src/huffbench/Makefile.in: Regenerate.
	* src/insertsort/Makefile.in: Regenerate.
	* src/int_matmult/Makefile.in: Regenerate.
	* src/janne_complex/Makefile.in: Regenerate.
	* src/jfdctint/Makefile.in: Regenerate.
	* src/lcdnum/Makefile.in: Regenerate.
	* src/levenshtein/Makefile.in: Regenerate.
	* src/lms/Makefile.in: Regenerate.
	* src/ludcmp/Makefile.in: Regenerate.
	* src/mergesort/Makefile.in: Regenerate.
	* src/miniz/Makefile.in: Regenerate.
	* src/minver/Makefile.in: Regenerate.
	* src/nbody/Makefile.in: Regenerate.
	* src/ndes/Makefile.in: Regenerate.
	* src/nettle-arcfour/Makefile.in: Regenerate.
	* src/nettle-cast128/Makefile.in: Regenerate.
	* src/nettle-des/Makefile.in: Regenerate.
	* src/nettle-md5/Makefile.in: Regenerate.
	* src/newlib-exp/Makefile.in: Regenerate.
	* src/newlib-log/Makefile.in: Regenerate.
	* src/newlib-mod/Makefile.in: Regenerate.
	* src/newlib-sqrt/Makefile.in: Regenerate.
	* src/ns/Makefile.in: Regenerate.
	* src/nsichneu/Makefile.in: Regenerate.
	* src/prime/Makefile.in: Regenerate.
	* src/qsort/Makefile.in: Regenerate.
	* src/qurt/Makefile.in: Regenerate.
	* src/recursion/Makefile.in: Regenerate.
	* src/rijndael/Makefile.in: Regenerate.
	* src/select/Makefile.in: Regenerate.
	* src/sglib-arraybinsearch/Makefile.in: Regenerate.
	* src/sglib-arraysort/Makefile.in: Regenerate.
	* src/sglib-arraysort1/Makefile.in: Regenerate.
	* src/sglib-dllist/Makefile.in: Regenerate.
	* src/sglib-hashtable/Makefile.in: Regenerate.
	* src/sglib-listinsertsort/Makefile.in: Regenerate.
	* src/sglib-listinsertsort1/Makefile.in: Regenerate.
	* src/sglib-listsort/Makefile.in: Regenerate.
	* src/sglib-queue/Makefile.in: Regenerate.
	* src/sglib-rbtree/Makefile.in: Regenerate.
	* src/sha/Makefile.in: Regenerate.
	* src/slre/Makefile.in: Regenerate.
	* src/sqrt/Makefile.in: Regenerate.
	* src/st/Makefile.in: Regenerate.
	* src/statemate/Makefile.in: Regenerate.
	* src/stringsearch1/Makefile.in: Regenerate.
	* src/strstr/Makefile.in: Regenerate.
	* src/tarai/Makefile.in: Regenerate.
	* src/template/Makefile.in: Regenerate.
	* src/ud/Makefile.in: Regenerate.
	* src/whetstone/Makefile.in: Regenerate.
	* src/wikisort/Makefile.in: Regenerate.