GFX: configurable x264 parameters #2113

Job	Run time
code formatting check	15s
cppcheck	18m 3s
min features with gcc	2m 45s
min features with g++	3m 6s
min features with clang	2m 57s
max features with gcc	4m 26s
max features with g++	2m 22s
max features with clang	3m 35s
max features with clang and AddressSanitized	3m 1s
max features with gcc and DEBUG	2m 33s
max features with gcc for 32-bit arch (legacy OS)	1m 40s
max features with g++ for 32-bit arch (legacy OS)	1m 34s
max features with clang for 32-bit arch (legacy OS)	2m 9s
	48m 26s

Provide feedback