Update libvpx snapshot to v0.9.7-p1 (Cayuga).

source/libvpx/vpx/vp8.h

 /*
  *  Copyright (c) 2010 The WebM 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 12 matching lines @@
  *  - In loop deblocking filter
  *  - Context-based entropy coding
  *
  * @{
  */
 /*!\file
  * \brief Provides controls common to both the VP8 encoder and decoder.
  */
 #ifndef VP8_H
 #define VP8_H
-#include "vpx/vpx_codec_impl_top.h"
+#include "vpx_codec_impl_top.h"
 
 /*!\brief Control functions
  *
  * The set of macros define the control functions of VP8 interface
  */
 enum vp8_com_control_id
 {
     VP8_SET_REFERENCE           = 1,    /**< pass in an external frame into decoder to be used as reference frame */
     VP8_COPY_REFERENCE          = 2,    /**< get a copy of reference frame from the decoder */
     VP8_SET_POSTPROC            = 3,    /**< set the decoder's post processing settings  */
@@ skipping 75 matching lines @@
 /*! @} - end defgroup vp8 */
 
 #if !defined(VPX_CODEC_DISABLE_COMPAT) || !VPX_CODEC_DISABLE_COMPAT
 /* The following definitions are provided for backward compatibility with
  * the VP8 1.0.x SDK. USE IN PRODUCTION CODE IS NOT RECOMMENDED.
  */
 
 DECLSPEC_DEPRECATED extern vpx_codec_iface_t vpx_codec_vp8_algo DEPRECATED;
 #endif
 
-#include "vpx/vpx_codec_impl_bottom.h"
+#include "vpx_codec_impl_bottom.h"
 #endif