headers: Import d3d12video.idl from Wine.

Signed-off-by: Jacek Caban <jacek@codeweavers.com>
diff --git a/mingw-w64-headers/wine-import.sh b/mingw-w64-headers/wine-import.sh
index d50f5c1..47ab427 100755
--- a/mingw-w64-headers/wine-import.sh
+++ b/mingw-w64-headers/wine-import.sh
@@ -157,6 +157,7 @@
 	d3d12 \
 	d3d12sdklayers \
 	d3d12shader \
+	d3d12video \
 	d3dcommon \
 	dcommon \
 	ddstream \