cmake HAS_GSH_VULKAN examples

jpd002/Play- Source/ui_ios/CMakeLists.txt :44 

list(APPEND UI_IOS_DEFINITIONS_LIST HAS_GSH_VULKAN=1)

jpd002/Play- Source/ui_qt/CMakeLists.txt :46 

list(APPEND UI_QT_DEFINITIONS_LIST HAS_GSH_VULKAN=1)

jpd002/Play- Source/ui_qt/DebugSupport/CMakeLists.txt :39 

list(APPEND PLAYDEBUGSUPPORT_DEFS HAS_GSH_VULKAN=1)