asfdemux: add ASF_OBJ_METADATA_LIBRARY_OBJECT

We can safely ignore those but best to claim to understand this object type so
we don't raise a warning.

https://bugzilla.gnome.org/show_bug.cgi?id=736060

gst/asfdemux/asfheaders.c

@@ -171,6 +171,9 @@ const ASFGuidHash asf_object_guids[] = {
   {ASF_OBJ_UNKNOWN_ENCRYPTION_OBJECT, "ASF_OBJ_UNKNOWN_ENCRYPTION_OBJECT",
         {0x9a04f079, 0x42869840, 0x5be692ab, 0x955f88e0}
       },
+  {ASF_OBJ_METADATA_LIBRARY_OBJECT, "ASF_OBJ_METADATA_LIBRARY_OBJECT",
+        {0x44231c94, 0x49d19498, 0x131d41a1, 0x5470454e}
+      },
   {ASF_OBJ_UNDEFINED, "ASF_OBJ_UNDEFINED",
         {0, 0, 0, 0}
       }

gst/asfdemux/asfheaders.h

@@ -68,7 +68,8 @@ typedef enum {
   ASF_OBJ_DIGITAL_SIGNATURE_OBJECT,
   ASF_OBJ_SCRIPT_COMMAND,
   ASF_OBJ_MARKER,
-  ASF_OBJ_UNKNOWN_ENCRYPTION_OBJECT
+  ASF_OBJ_UNKNOWN_ENCRYPTION_OBJECT,
+  ASF_OBJ_METADATA_LIBRARY_OBJECT,
 } AsfObjectID;
 
 typedef enum {

gst/asfdemux/gstasfdemux.c

@@ -4073,6 +4073,7 @@ gst_asf_demux_process_object (GstASFDemux * demux, guint8 ** p_data,
     case ASF_OBJ_INDEX_PARAMETERS:
     case ASF_OBJ_STREAM_PRIORITIZATION:
     case ASF_OBJ_SCRIPT_COMMAND:
+    case ASF_OBJ_METADATA_LIBRARY_OBJECT:
     default:
       /* Unknown/unhandled object, skip it and hope for the best */
       GST_INFO ("%s: skipping object", demux->objpath);