Flip diagnostic from Warning to ExtWarn so that it's an error  with -pedantic-errors.  This fixes the C99 part of PR3919.
Flip diagnostic from Warning to ExtWarn so that it's an error 
with -pedantic-errors.  This fixes the C99 part of PR3919.



git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@68178 91177308-0d34-0410-b5e6-96231b3b80d8

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