libvpx: Pull from upstream

source/libvpx/vp9/common/vp9_enums.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 86 matching lines @@
   ADST_ADST = 3,                      // ADST in both directions
   TX_TYPES = 4
 } TX_TYPE;
 
 typedef enum {
   UNKNOWN    = 0,
   BT_601     = 1,  // YUV
   BT_709     = 2,  // YUV
   SMPTE_170  = 3,  // YUV
   SMPTE_240  = 4,  // YUV
-  RESERVED_1 = 5,
+  BT_2020    = 5,  // YUV
   RESERVED_2 = 6,
   SRGB       = 7   // RGB
 } COLOR_SPACE;
 
 typedef enum {
   VP9_LAST_FLAG = 1 << 0,
   VP9_GOLD_FLAG = 1 << 1,
   VP9_ALT_FLAG = 1 << 2,
 } VP9_REFFRAME;
 
 #ifdef __cplusplus
 }  // extern "C"
 #endif
 
 #endif  // VP9_COMMON_VP9_ENUMS_H_