Fix undefined references issues for pow

Linker (for gcc < 4.9) is complaining about missing math functions
(like pow) even though we have -lm in "Makefile.include". If we put
"-lm" as last statement it just works.
Added missing include for puts
Added BOARD_BLACKLIST to examples/crypto_shell and test/test_aes_ccm

Following boards are blacklisted because they are affected by #1061:
* chronos
* msb-430, msb-430h
* telosb
* wsn430-v1_3b, wsn430-v1_4
* z1