Added wikisort benchmark

    * Makefile.am: Added wikisort benchmark
    * Makefile.in: Regenerated
    * configure: Regenerated
    * configure.ac: Added wikisort benchmark
    * src/wikisort/Makefile.am: Added wikisort benchmark
    * src/wikisort/Makefile.in: Regenerated
    * src/wikisort/wikisort.c: Added wikisort benchmark