try plain-old code for sk_memset16/32 now that NEON is compile-time

src/core/SkOpts.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkOpts_DEFINED
 #define SkOpts_DEFINED
 
 #include "SkMatrix.h"
 #include "SkTextureCompressor.h"
 #include "SkTypes.h"
 #include "SkXfermode.h"
 
 struct ProcCoeff;
 
 namespace SkOpts {
     // Call to replace pointers to portable functions with pointers to CPU-specific functions.
     // Thread-safe and idempotent.
     // Called by SkGraphics::Init(), and automatically #if SK_ALLOW_STATIC_GLOBAL_INITIALIZERS.
     void Init();
 
     // Declare function pointers here...
 
-    // See SkUtils.h
-    extern void (*memset16)(uint16_t[], uint16_t, int);
-    extern void (*memset32)(uint32_t[], uint32_t, int);
-
     // May return nullptr if we haven't specialized the given Mode.
     extern SkXfermode* (*create_xfermode)(const ProcCoeff&, SkXfermode::Mode);
 
     typedef void (*BoxBlur)(const SkPMColor*, int, const SkIRect& srcBounds, SkPMColor*, int, int, int, int, int);
     extern BoxBlur box_blur_xx, box_blur_xy, box_blur_yx;
 
     typedef void (*Morph)(const SkPMColor*, SkPMColor*, int, int, int, int, int);
     extern Morph dilate_x, dilate_y, erode_x, erode_y;
 
     typedef bool (*TextureCompressor)(uint8_t* dst, const uint8_t* src,
@@ skipping 26 matching lines @@
                         grayA_to_RGBA,         // i.e. expand to color channels
                         grayA_to_rgbA,         // i.e. expand to color channels and premultiply
                         inverted_CMYK_to_RGB1, // i.e. convert color space
                         inverted_CMYK_to_BGR1; // i.e. convert color space
 
     extern void (*half_to_float)(float[], const uint16_t[], int);
     extern void (*float_to_half)(uint16_t[], const float[], int);
 }
 
 #endif//SkOpts_DEFINED