ATI_OS_WIN -> _WIN32
ATI_OS_LINUX -> __linux__
We should not rely on non-standard macros for platform detections.
Change-Id: If1d06e2e1187268df62a59609ea5496ab7eb709d
Currently LiquidFlash cannot be supported from Github Enterprise,
hence we need to be able to build with out it.
Allow this by setting -DWITH_LIQUID_FLASH=0.
Change-Id: I8f147b5d52ca1c8203000beea8f16b2699548dc3