Added strstr benchmark

    * Makefile.am: Added strstr benchmark
    * Makefile.in: Regenerated
    * configure: Regenerated
    * configure.ac: Added strstr benchmark
    * src/strstr/Makefile.am: Added strstr benchmark
    * src/strstr/Makefile.in: Regenerated
    * src/strstr/strstr.c: Added strstr benchmark
Fix to make blowfish use less memory

    * src/blowfish/bf.c: Move key off the stack
    * src/blowfish/bf_pi.h: Make const, so the init stays in flash