test/Sema/tls.c: don't use -verify to check if TLS is supported
test/Sema/tls.c: don't use -verify to check if TLS is supported

Use "%clang_cc1" vs "not %clang_cc1" instead.
Also use -fsyntax-only.

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@161165 91177308-0d34-0410-b5e6-96231b3b80d8

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