Add color metadata from libraw. (#3561)
Add color metadata from libraw. (#3561)

2 vectors, pre_mul and cam_mul.
2 matrices, cam_xyz[4][3] and rgb_cam[3][4], delivered as 1D tab.

Co-authored-by: demoulinv <5eb31eef0f39f65258ed315c6ee7cd995f52cbe9@technicolor.com>
lgritz/oiio,OpenImageIO/oiio,lgritz/oiio,lgritz/oiio,OpenImageIO/oiio,lgritz/oiio,OpenImageIO/oiio,OpenImageIO/oiio