Clang asserts "Invalid environment!" when using -ccc-host-triple  arch-pc-win32-macho (e.g., x86_64-pc-win32-macho), which appears to be a false positive. rdar://9786307
Clang asserts "Invalid environment!" when using -ccc-host-triple 
arch-pc-win32-macho (e.g., x86_64-pc-win32-macho), which appears to be a false
positive.
rdar://9786307

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@135502 91177308-0d34-0410-b5e6-96231b3b80d8

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