If should_autorotate, what are the supported interface orientations?

Redef to return values of Objective-C UIInterfaceOrientationMask

Property definitions

ios $ NitGLKView :: supported_interface_orientations
	# If `should_autorotate`, what are the supported interface orientations?
	#
	# Redef to return values of Objective-C `UIInterfaceOrientationMask`
	fun supported_interface_orientations: Int do return 0
lib/ios/glkit.nit:156,2--159,54