Don't use GFX if server max_bpp is <32 #1071

Job	Run time
code formatting check	36s
cppcheck	18m 57s
min features with gcc	2m 51s
min features with g++	2m 9s
min features with clang	2m 47s
max features with gcc	3m 47s
max features with g++	3m 7s
max features with clang	3m 26s
max features with gcc and DEBUG	2m 18s
max features with gcc for 32-bit arch (legacy OS)	1m 42s
max features with g++ for 32-bit arch (legacy OS)	1m 46s
max features with clang for 32-bit arch (legacy OS)	2m 2s
	45m 28s

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