NEON optimizations for gray -> RGBA (or BGRA) conversions

src/opts/SkOpts_neon.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkOpts.h"
 
 #define SK_OPTS_NS sk_neon
@@ skipping 34 matching lines @@
 
         matrix_translate       = sk_neon::matrix_translate;
         matrix_scale_translate = sk_neon::matrix_scale_translate;
         matrix_affine          = sk_neon::matrix_affine;
 
         RGBA_to_BGRA = sk_neon::RGBA_to_BGRA;
         RGBA_to_rgbA = sk_neon::RGBA_to_rgbA;
         RGBA_to_bgrA = sk_neon::RGBA_to_bgrA;
         RGB_to_RGB1  = sk_neon::RGB_to_RGB1;
         RGB_to_BGR1  = sk_neon::RGB_to_BGR1;
+        gray_to_RGB1 = sk_neon::gray_to_RGB1;
     }
 }