Add support for NEON intrinsics to speed up texture compression. We can

src/opts/SkTextureCompression_opts_neon.h

Index: src/opts/SkTextureCompression_opts_neon.h
diff --git a/src/opts/SkTextureCompression_opts_neon.h b/src/opts/SkTextureCompression_opts_neon.h
new file mode 100644
index 0000000000000000000000000000000000000000..dd5e75df57d5687ee0622b0d02801864a475d0fd
--- /dev/null
+++ b/src/opts/SkTextureCompression_opts_neon.h
@@ -0,0 +1,14 @@
+/*
+ * 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 SkTextureCompression_opts_neon_h_
+#define SkTextureCompression_opts_neon_h_
+
+bool CompressA8toR11EAC_NEON(uint8_t* dst, const uint8_t* src,
+                             int width, int height, int rowBytes);
+
+#endif  // SkTextureCompression_opts_neon_h_