libvpx: Pull from upstream

source/libvpx/vpx_scale/yv12config.h

Index: source/libvpx/vpx_scale/yv12config.h
===================================================================
--- source/libvpx/vpx_scale/yv12config.h	(revision 291857)
+++ source/libvpx/vpx_scale/yv12config.h	(working copy)
@@ -55,6 +55,8 @@
   int flags;
 } YV12_BUFFER_CONFIG;
 
+#define YV12_FLAG_HIGHBITDEPTH 1
+
 int vp8_yv12_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf,
                                 int width, int height, int border);
 int vp8_yv12_realloc_frame_buffer(YV12_BUFFER_CONFIG *ybf,
@@ -63,6 +65,9 @@
 
 int vp9_alloc_frame_buffer(YV12_BUFFER_CONFIG *ybf,
                            int width, int height, int ss_x, int ss_y,
+#if CONFIG_VP9_HIGHBITDEPTH
+                           int use_highbitdepth,
+#endif
                            int border);
 
 // Updates the yv12 buffer config with the frame buffer. If cb is not
@@ -73,6 +78,9 @@
 // on failure.
 int vp9_realloc_frame_buffer(YV12_BUFFER_CONFIG *ybf,
                              int width, int height, int ss_x, int ss_y,
+#if CONFIG_VP9_HIGHBITDEPTH
+                             int use_highbitdepth,
+#endif
                              int border,
                              vpx_codec_frame_buffer_t *fb,
                              vpx_get_frame_buffer_cb_fn_t cb,