neon code for bgra to rgba conversion for copyFTBitmap

src/opts/SkFontHost_FreeType_common_opts_neon.h

Index: src/opts/SkFontHost_FreeType_common_opts_neon.h
diff --git a/src/opts/SkFontHost_FreeType_common_opts_neon.h b/src/opts/SkFontHost_FreeType_common_opts_neon.h
new file mode 100644
index 0000000000000000000000000000000000000000..fc78b656ce9c7bd929dcc5e1dbada8b336d0db31
--- /dev/null
+++ b/src/opts/SkFontHost_FreeType_common_opts_neon.h
@@ -0,0 +1,7 @@
+
+/**
+ *  convert pixel format to SkPMColor when src format is FT_PIXEL_MODE_BGRA 
+ *  src: FT_Bitmap.buffer
+ */
+void SkPackARGB32_neon(const uint32_t* src, SkPMColor* dst, int height, int width, 
+                       size_t dstRowBytes, size_t srcRowBytes);