Add support of libraw release < 0.16.0

Minimum version supported are 0.14.x, but with minimum support of extra options from Libraw, as RawSpeed codec support, LCMS support, GPL2 and GPL3 packs supports, etc...
All these options are registered and shared into a new libraw_config.h with 0.16.0, which do not exist in previous release.
CCBUGS: 307146