ARM: fix arm_neon_intrinsics.c and re-enable.
ARM: fix arm_neon_intrinsics.c and re-enable.

It turns out I'd never actually tested my recent change because it was
gated on long-tests. Failure ensued.

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@263093 91177308-0d34-0410-b5e6-96231b3b80d8

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