libvpx: Pull from upstream

source/libvpx/vp9/encoder/vp9_dct.h

-/*
- *  Copyright (c) 2013 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.
- */
-
-
-#ifndef VP9_ENCODER_VP9_DCT_H_
-#define VP9_ENCODER_VP9_DCT_H_
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-void vp9_fht4x4(TX_TYPE tx_type, const int16_t *input, int16_t *output,
-                int stride);
-
-void vp9_fht8x8(TX_TYPE tx_type, const int16_t *input, int16_t *output,
-                int stride);
-
-void vp9_fht16x16(TX_TYPE tx_type, const int16_t *input, int16_t *output,
-                  int stride);
-
-#ifdef __cplusplus
-}  // extern "C"
-#endif
-
-#endif  // VP9_ENCODER_VP9_DCT_H_