Move immintrin/arm_neon includes to where they are used.

src/opts/SkBlurImageFilter_opts.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 SkBlurImageFilter_opts_DEFINED
 #define SkBlurImageFilter_opts_DEFINED
 
 #include "SkColorPriv.h"
 #include "SkTypes.h"
 
+#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2
+    #include <immintrin.h>
+#endif
+
 namespace SK_OPTS_NS {
 
 enum class BlurDirection { kX, kY };
 
 #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2
 #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE41
 // ARGB -> 000A 000R 000G 000B
 static inline __m128i expand(SkPMColor p) {
     return _mm_cvtepu8_epi32(_mm_cvtsi32_si128(p));
 };
@@ skipping 285 matching lines @@
     }
 }
 
 static auto box_blur_xx = &box_blur<BlurDirection::kX, BlurDirection::kX>,
             box_blur_xy = &box_blur<BlurDirection::kX, BlurDirection::kY>,
             box_blur_yx = &box_blur<BlurDirection::kY, BlurDirection::kX>;
 
 }  // namespace SK_OPTS_NS
 
 #endif