FORMUS3IC_LAS3 / embb

base_c: functions without error code return only assert the validity of their arguments, documentation changed accordingly

portability: changed all checks for platform specific defines to checks for EMBB_* defines, fixed affinity implementation for FreeBSD

  (this probably works on MacOS too, but not tested yet)

While on it, fix error message. The missing include file
is not the root cause of the problem. The missing implementation
of embb_core_count_available() is.