Fix up the previous DirectoryWatcher test commit
Fix up the previous DirectoryWatcher test commit

Two-stage build is failed otherwise.

apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang