fixes for iOS build of shaders
fixes for iOS build of shaders

libnui/nui3,UIKit0/nui3,UIKit0/nui3,UIKit0/nui3,libnui/nui3,UIKit0/nui3,UIKit0/nui3,libnui/nui3,UIKit0/nui3,libnui/nui3,UIKit0/nui3,libnui/nui3,libnui/nui3