Cherry pick "Rename neon convolve avg file"

source/libvpx/vp9/common/arm/neon/vp9_convolve_avg_neon.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.
  */
 
@@ skipping 125 matching lines @@
 
             d0u32 = vreinterpret_u32_u8(d0u8);
             vst1_lane_u32((uint32_t *)dst, d0u32, 0);
             dst += dst_stride;
             vst1_lane_u32((uint32_t *)dst, d0u32, 1);
             dst += dst_stride;
         }
     }
     return;
 }