Fix up local changes after r349125
Fix up local changes after r349125

warn_attribute_type_not_supported needs the Sema diag header.

rdar://problem/46720351

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