Add SSE4 version of BlurImage optimizations.

src/opts/SkBlurImage_opts_SSE4.h

Index: src/opts/SkBlurImage_opts_SSE4.h
diff --git a/src/opts/SkBlurImage_opts_SSE2.h b/src/opts/SkBlurImage_opts_SSE4.h
similarity index 64%
copy from src/opts/SkBlurImage_opts_SSE2.h
copy to src/opts/SkBlurImage_opts_SSE4.h
index db104bacf4fd1ea4beaa021cbc68be60f08b5ba5..9f346a97928d6e736b6bae83a175e550619dc0ea 100644
--- a/src/opts/SkBlurImage_opts_SSE2.h
+++ b/src/opts/SkBlurImage_opts_SSE4.h
@@ -1,16 +1,16 @@
 /*
- * Copyright 2013 The Android Open Source Project
+ * Copyright 2014 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.
  */
 
-#ifndef SkBlurImage_opts_SSE2_DEFINED
-#define SkBlurImage_opts_SSE2_DEFINED
+#ifndef SkBlurImage_opts_SSE4_DEFINED
+#define SkBlurImage_opts_SSE4_DEFINED
 
 #include "SkBlurImage_opts.h"
 
-bool SkBoxBlurGetPlatformProcs_SSE2(SkBoxBlurProc* boxBlurX,
+bool SkBoxBlurGetPlatformProcs_SSE4(SkBoxBlurProc* boxBlurX,
                                     SkBoxBlurProc* boxBlurY,
                                     SkBoxBlurProc* boxBlurXY,
                                     SkBoxBlurProc* boxBlurYX);