Move immintrin/arm_neon includes to where they are used.

src/opts/SkSwizzler_opts.h

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkSwizzler_opts_DEFINED
 #define SkSwizzler_opts_DEFINED
 
 #include "SkColorPriv.h"
 
+#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSSE3
+    #include <immintrin.h>
+#elif defined(SK_ARM_HAS_NEON)
+    #include <arm_neon.h>
+#endif
+
 namespace SK_OPTS_NS {
 
 static void RGBA_to_rgbA_portable(uint32_t* dst, const void* vsrc, int count) {
     auto src = (const uint32_t*)vsrc;
     for (int i = 0; i < count; i++) {
         uint8_t a = src[i] >> 24,
                 b = src[i] >> 16,
                 g = src[i] >>  8,
                 r = src[i] >>  0;
         b = (b*a+127)/255;
@@ skipping 808 matching lines @@
 
 static void inverted_CMYK_to_BGR1(uint32_t dst[], const void* src, int count) {
     inverted_CMYK_to_BGR1_portable(dst, src, count);
 }
 
 #endif
 
 }
 
 #endif // SkSwizzler_opts_DEFINED