Add VP8 and H264 depacketizer fuzzers.

webrtc/test/fuzzers/vp8_depacketizer_fuzzer.cc

 /*
  *  Copyright (c) 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.
  */
-#include "webrtc/modules/rtp_rtcp/source/rtp_format_vp9.h"
+#include "webrtc/modules/rtp_rtcp/source/rtp_format_vp8.h"
 
 namespace webrtc {
 void FuzzOneInput(const uint8_t* data, size_t size) {
-  RtpDepacketizerVp9 depacketizer;
+  RtpDepacketizerVp8 depacketizer;
   RtpDepacketizer::ParsedPayload parsed_payload;
   depacketizer.Parse(&parsed_payload, data, size);
 }
 }  // namespace webrtc