
Add -Wno-rewrite-macros to silence the following warning when using -rewrite-test:

xx.m:10:3: warning: rewriting sub-expression within a macro (may not be correct)



git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@46462 91177308-0d34-0410-b5e6-96231b3b80d8

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