Merge pull request #3946 from apple/swift-preview-4-update-for-xcode-8-beta-4

Update swift-3.0-preview-4-branch to build with Xcode 8 beta 4, OS X …

Author: shahmishal

CODE_OWNERS.TXT

@@ -39,10 +39,6 @@ N: John McCall
 E: [email protected]
 D: Demangler, IRGen, Runtime
 
-N: Joe Pamer
-E: [email protected]
-D: Expression type checker (Sema/ConstraintSystem)
-
 N: Jordan Rose
 E: [email protected]
 D: ClangImporter, Serialization, (Objective-)C printer, Driver