Merge pull request #18518 from moiseev/deprecate-assets

[overlay] The AssetsLibrary APIs have been deprecated since iOS 9

Author: moiseev

stdlib/public/SDK/AssetsLibrary/ALAssetsLibrary.swift

@@ -13,6 +13,7 @@
 @_exported import AssetsLibrary // Clang module
 
 extension ALAssetsLibrary { 
+  @available(iOS, deprecated: 9.0)
   @nonobjc
   public func enumerateGroupsWithTypes(_ types: UInt32,
       usingBlock enumerationBlock: ALAssetsLibraryGroupsEnumerationResultsBlock!,