vaapi: fix local header include.

Signed-off-by: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
(cherry picked from commit aea611dc)

libavcodec/vaapi.h

@@ -31,7 +31,7 @@
  */
 
 #include <stdint.h>
-#include <libavutil/attributes.h>
+#include "libavutil/attributes.h"
 #include "version.h"
 
 /**