LimeSuite.h: Introduce define LMS_LOG_CRITICAL
LimeSuite.h: Introduce define LMS_LOG_CRITICAL

This log level is available in Logger.hpp but missing in the C public
API.

limemicro/lms7suite,myriadrf/LimeSuite,myriadrf/LimeSuite,myriadrf/LimeSuite,limemicro/lms7suite,limemicro/lms7suite,myriadrf/LimeSuite,limemicro/lms7suite,limemicro/lms7suite,myriadrf/LimeSuite