SpriteKit tvOS xcode9 beta2

#SpriteKit.framework https://github.com/xamarin/xamarin-macios/pull/2331

diff -ruN /Applications/Xcode9-beta1.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS.sdk/System/Library/Frameworks/SpriteKit.framework/Headers/SKVersion.h /Applications/Xcode9-beta2.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS.sdk/System/Library/Frameworks/SpriteKit.framework/Headers/SKVersion.h
--- /Applications/Xcode9-beta1.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS.sdk/System/Library/Frameworks/SpriteKit.framework/Headers/SKVersion.h	2017-05-20 02:56:38.000000000 -0400
+++ /Applications/Xcode9-beta2.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS.sdk/System/Library/Frameworks/SpriteKit.framework/Headers/SKVersion.h	2017-06-09 19:52:21.000000000 -0400
@@ -1 +1 @@
-#define SK_VERSION 19009002
+#define SK_VERSION 19010000
diff -ruN /Applications/Xcode9-beta1.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS.sdk/System/Library/Frameworks/SpriteKit.framework/Headers/SpriteKit.apinotes /Applications/Xcode9-beta2.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS.sdk/System/Library/Frameworks/SpriteKit.framework/Headers/SpriteKit.apinotes
--- /Applications/Xcode9-beta1.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS.sdk/System/Library/Frameworks/SpriteKit.framework/Headers/SpriteKit.apinotes	1969-12-31 19:00:00.000000000 -0500
+++ /Applications/Xcode9-beta2.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS.sdk/System/Library/Frameworks/SpriteKit.framework/Headers/SpriteKit.apinotes	2017-06-09 19:52:21.000000000 -0400
@@ -0,0 +1,34 @@
+---
+Name: SpriteKit
+Classes:
+- Name: SKMutableTexture
+  Methods:
+  - Selector: 'initWithSize:'
+    MethodKind: Instance
+    Nullability:
+    - S
+    NullabilityOfRet: N
+  - Selector: 'initWithSize:pixelFormat:'
+    MethodKind: Instance
+    Nullability:
+    - S
+    - S
+    NullabilityOfRet: N
+  - Selector: 'modifyPixelDataWithBlock:'
+    MethodKind: Instance
+    Nullability:
+    - N
+    NullabilityOfRet: S
+  - Selector: 'mutableTextureWithSize:'
+    MethodKind: Class
+    Nullability:
+    - S
+    NullabilityOfRet: N
+- Name: SKReachConstraints
+  Methods:
+  - Selector: 'initWithLowerAngleLimit:upperAngleLimit:'
+    MethodKind: Instance
+    Nullability:
+    - S
+    - S
+    NullabilityOfRet: N