[spritekit] Update for iOS 10.2 beta 1 - #1111

[spritekit] Update for iOS 10.2 beta 1#1111

spouliot merged 2 commits into

dotnet:xcode8.2dotnet/macios:xcode8.2from

VincentDondain:spritekit-b1VincentDondain/xamarin-macios:spritekit-b1Copy head branch name to clipboard