Add MIPS SIMD Arch (MSA) optimized MirrorRow function

libyuv.gypi

 # Copyright 2014 The LibYuv 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.
 
 {
   'variables': {
     'libyuv_sources': [
       # includes.
       'include/libyuv.h',
       'include/libyuv/basic_types.h',
       'include/libyuv/compare.h',
       'include/libyuv/convert.h',
       'include/libyuv/convert_argb.h',
       'include/libyuv/convert_from.h',
       'include/libyuv/convert_from_argb.h',
       'include/libyuv/cpu_id.h',
+      'include/libyuv/macros_msa.h',
       'include/libyuv/mjpeg_decoder.h',
       'include/libyuv/planar_functions.h',
       'include/libyuv/rotate.h',
       'include/libyuv/rotate_argb.h',
       'include/libyuv/rotate_row.h',
       'include/libyuv/row.h',
       'include/libyuv/scale.h',
       'include/libyuv/scale_argb.h',
       'include/libyuv/scale_row.h',
       'include/libyuv/version.h',
@@ skipping 23 matching lines @@
       'source/rotate_common.cc',
       'source/rotate_gcc.cc',
       'source/rotate_mips.cc',
       'source/rotate_neon.cc',
       'source/rotate_neon64.cc',
       'source/rotate_win.cc',
       'source/row_any.cc',
       'source/row_common.cc',
       'source/row_gcc.cc',
       'source/row_mips.cc',
+      'source/row_msa.cc',
       'source/row_neon.cc',
       'source/row_neon64.cc',
       'source/row_win.cc',
       'source/scale.cc',
       'source/scale_any.cc',
       'source/scale_argb.cc',
       'source/scale_common.cc',
       'source/scale_gcc.cc',
       'source/scale_mips.cc',
       'source/scale_neon.cc',
       'source/scale_neon64.cc',
       'source/scale_win.cc',
       'source/video_common.cc',
     ],
   }
 }