libvpx: Pull from upstream

source/libvpx/vp9/encoder/vp9_avg.c

 /*
  *  Copyright (c) 2014 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.
  */
+#include "./vp9_rtcd.h"
 #include "vp9/common/vp9_common.h"
 #include "vpx_ports/mem.h"
 
 unsigned int vp9_avg_8x8_c(const uint8_t *s, int p) {
   int i, j;
   int sum = 0;
   for (i = 0; i < 8; ++i, s+=p)
     for (j = 0; j < 8; sum += s[j], ++j) {}
 
   return (sum + 32) >> 6;
@@ skipping 181 matching lines @@
     for (j = 0; j < 8; ++j) {
       int diff = abs(s[j]-d[j]);
       *min = diff < *min ? diff : *min;
       *max = diff > *max ? diff : *max;
     }
   }
 }
 #endif  // CONFIG_VP9_HIGHBITDEPTH