rename blitrow::proc and add (uncalled) hook for colorproc16

src/opts/SkBlitRow_opts_arm_neon.cpp

 /*
  * Copyright 2012 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBlitRow_opts_arm_neon.h"
 
 #include "SkBlitMask.h"
@@ skipping 1628 matching lines @@
     while (count > 0) {
         *dst = color + SkAlphaMulQ(*src, scale);
         src += 1;
         dst += 1;
         count--;
     }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
-const SkBlitRow::Proc sk_blitrow_platform_565_procs_arm_neon[] = {
+const SkBlitRow::Proc16 sk_blitrow_platform_565_procs_arm_neon[] = {
     // no dither
     S32_D565_Opaque_neon,
     S32_D565_Blend_neon,
     S32A_D565_Opaque_neon,
 #if 0
     S32A_D565_Blend_neon,
 #else
     NULL,   // https://code.google.com/p/skia/issues/detail?id=2845
             // https://code.google.com/p/skia/issues/detail?id=2797
 #endif
@@ skipping 22 matching lines @@
     S32A_Opaque_BlitRow32_neon_src_alpha,   // S32A_Opaque,
 #else
     S32A_Opaque_BlitRow32_neon,     // S32A_Opaque,
 #endif
 #ifdef SK_CPU_ARM32
     S32A_Blend_BlitRow32_neon        // S32A_Blend
 #else
     NULL
 #endif
 };