Fix sanity tests

src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper_libuv_windows.cc

@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2016 gRPC authors.
+ * Copyright 2019 gRPC authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper_libuv_windows.h

@@ -1,6 +1,26 @@
+/*
+ *
+ * Copyright 2019 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
 #ifndef GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_RESOLVER_DNS_C_ARES_GRPC_ARES_WRAPPER_LIBUV_WINDOWS_H
 #define GRPC_CORE_EXT_FILTERS_CLIENT_CHANNEL_RESOLVER_DNS_C_ARES_GRPC_ARES_WRAPPER_LIBUV_WINDOWS_H
 
+#include <grpc/support/port_platform.h>
+
 #include <grpc/support/string_util.h>
 
 #include "src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_wrapper.h"