__STDC_FORMAT_MACROS changes the behavior of inttypes.h to allow
defining format macros for printf-like functions. It needs to be defined
before any include is done, otherwise due to include chains and header
guards it may not take effect.
Instead of having to define it everywhere it is used, move the define to the
build system. Also update ecl and DriverFramework submodules to deal with the
changed definitions.
Instead of having separate log functions for NuttX and POSIX, this now
switches everything to px4_log.h and PX4_INFO/WARN/ERR/DEBUG.
Also, the call mostly used is now a static inline function instead of a
macro which lead to a big increase in flash size for STM32.
