Merge commit '928061670e873e816daa14827853b7e11221ff5f'

Merge commit '928061670e873e816daa14827853b7e11221ff5f'

* commit '928061670e873e816daa14827853b7e11221ff5f':
  libswscale: GBRAP input & output and GBRAP16 input support

Conflicts:
	libswscale/input.c
	libswscale/swscale_internal.h
	libswscale/swscale_unscaled.c
	libswscale/utils.c
	tests/ref/fate/filter-pixdesc-gbrap
	tests/ref/fate/filter-pixfmts-copy
	tests/ref/fate/filter-pixfmts-null
	tests/ref/fate/filter-pixfmts-scale
	tests/ref/fate/filter-pixfmts-vflip

See: 5c057433ccd32f37ddc828d3f82c5b1ad7d3e3db
Merged-by: Michael Niedermayer <michaelni@gmx.at>