Updating PPC target to ignore commas in asm contrains, as apparently that is what gcc does.
Updating PPC target to ignore commas in asm contrains, as apparently that is what gcc does.

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@107953 91177308-0d34-0410-b5e6-96231b3b80d8

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