Add MVK_XCODE_13 code macro. Support MTLLanguageVersion2_4 enum value. MoltenVKPackaging project add DISABLE_MANUAL_TARGET_ORDER_BUILD_WARNING build setting to suppress build warnings about using manual build orders.
Add MVK_XCODE_13 code macro. Support MTLLanguageVersion2_4 enum value. MoltenVKPackaging project add DISABLE_MANUAL_TARGET_ORDER_BUILD_WARNING build setting to suppress build warnings about using manual build orders.