modern objective-c translator: conditionally include <string.h>. // rdar://11847319
modern objective-c translator: conditionally include
<string.h>. // rdar://11847319


git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@160287 91177308-0d34-0410-b5e6-96231b3b80d8

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