system/weaved: Make weaved compile and run on Brillo

This is an intermediate step in making weaved daemon compile
and run on Brillo. Right now it starts up successfully at system
boot.

Now we just need to hook it up to other system components such as
web server, avahi, etc.

Bug: 23113639
Change-Id: I163e2558ff2a2ed800d8e4eb28fab727bf844602
diff --git a/buffet/stub_mdns_client.cc b/buffet/stub_mdns_client.cc
new file mode 100644
index 0000000..e535014
--- /dev/null
+++ b/buffet/stub_mdns_client.cc
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2015 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#include "buffet/mdns_client.h"
+
+namespace buffet {
+
+std::unique_ptr<MdnsClient> MdnsClient::CreateInstance() {
+  return std::unique_ptr<MdnsClient>{new MdnsClient};
+}
+
+}  // namespace buffet