libvpx: Pull from upstream

source/libvpx/third_party/libyuv/include/libyuv/convert_from.h

Index: source/libvpx/third_party/libyuv/include/libyuv/convert_from.h
diff --git a/source/libvpx/third_party/libyuv/include/libyuv/convert_from.h b/source/libvpx/third_party/libyuv/include/libyuv/convert_from.h
index d6c0e3d8703e8c1a384e8db3eab4779a6e1331d3..9fd8d4de5f3fef5c1e23704f4a331d9367e4456c 100644
--- a/source/libvpx/third_party/libyuv/include/libyuv/convert_from.h
+++ b/source/libvpx/third_party/libyuv/include/libyuv/convert_from.h
@@ -137,6 +137,17 @@ int I420ToRGB565(const uint8* src_y, int src_stride_y,
                  uint8* dst_frame, int dst_stride_frame,
                  int width, int height);
 
+// Convert I420 To RGB565 with 4x4 dither matrix (16 bytes).
+// Values in dither matrix from 0 to 7 recommended.
+// The order of the dither matrix is first byte is upper left.
+
+LIBYUV_API
+int I420ToRGB565Dither(const uint8* src_y, int src_stride_y,
+                       const uint8* src_u, int src_stride_u,
+                       const uint8* src_v, int src_stride_v,
+                       uint8* dst_frame, int dst_stride_frame,
+                       const uint8* dither4x4, int width, int height);
+
 LIBYUV_API
 int I420ToARGB1555(const uint8* src_y, int src_stride_y,
                    const uint8* src_u, int src_stride_u,