Moving stun_prober target from webrtc/p2p to webrtc/examples

webrtc/examples/stunprober/main.cc

 /*
  *  Copyright 2015 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 120 matching lines @@
   auto finish_callback = [thread](StunProber* prober, int result) {
     StopTrial(thread, prober, result);
   };
   prober->Start(server_addresses, FLAG_shared_socket, FLAG_interval,
                 FLAG_pings_per_ip, FLAG_timeout,
                 AsyncCallback(finish_callback));
   thread->Run();
   delete prober;
   return 0;
 }