Move GameKit overlay to GameCenter.

In iOS 9 and OS X 10.11 the old GameKit was effectively renamed GameCenter, while
the new GameKit is a sort of umbrella framework like Cocoa. We need to support
backwards deployment, though, so the GameCenter overlay links to GameKit.framework.
(This is essentially the same solution implemented for CoreImage moving out of
QuartzCore in r28449)

rdar://problem/21340738

Swift SVN r30322

apinotes/GameKit.apinotes → apinotes/GameCenter.apinotes

@@ -1,4 +1,4 @@
-Name:            GameKit
+Name:            GameCenter
 Classes:
   - Name: GKLocalPlayer
     Methods:

stdlib/public/SDK/CMakeLists.txt

@@ -16,7 +16,7 @@ add_subdirectory(Darwin)
 add_subdirectory(Dispatch)
 add_subdirectory(EventKit)
 add_subdirectory(Foundation)
-add_subdirectory(GameKit)
+add_subdirectory(GameCenter)
 add_subdirectory(GameplayKit)
 add_subdirectory(GLKit)
 add_subdirectory(HomeKit)

stdlib/public/SDK/GameCenter/CMakeLists.txt

@@ -0,0 +1,8 @@
+add_swift_library(swiftGameCenter IS_SDK_OVERLAY
+  GameCenter.swift
+  TARGET_SDKS OSX IOS IOS_SIMULATOR TVOS TVOS_SIMULATOR
+  SWIFT_MODULE_DEPENDS Foundation
+  SWIFT_MODULE_DEPENDS_OSX AppKit
+  SWIFT_MODULE_DEPENDS_IOS_TVOS UIKit
+  FRAMEWORK_DEPENDS GameKit # some of these types used to be in GameKit
+  )

stdlib/public/SDK/GameKit/GameKit.swift → stdlib/public/SDK/GameCenter/GameCenter.swift

@@ -1,4 +1,4 @@
-@exported import GameKit
+@exported import GameCenter
 import Foundation
 
 extension GKErrorCode : _BridgedNSError {