Fix PR2281: these two warnings should be promoted to error on pedantic error.  Perhaps I should add a class of 'extension' that is 'extension that warns by default', which would be cleaner.
Fix PR2281: these two warnings should be promoted to error on
pedantic error.  Perhaps I should add a class of 'extension' that is
'extension that warns by default', which would be cleaner.


git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@50633 91177308-0d34-0410-b5e6-96231b3b80d8

apple/swift-clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang