Prefer libvorbis encoder over libavcodec's

lavc's is marked as experimental
(cherry picked from commit 835f1233204bf0c3e1828f2b555993a6e63f05d9)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/codec/vorbis.c

@@ -203,7 +203,7 @@ vlc_module_begin ()
 #   define ENC_CFG_PREFIX "sout-vorbis-"
     add_submodule ()
     set_description( N_("Vorbis audio encoder") )
-    set_capability( "encoder", 100 )
+    set_capability( "encoder", 130 )
     set_callbacks( OpenEncoder, CloseEncoder )
 
     add_integer( ENC_CFG_PREFIX "quality", 0, NULL, ENC_QUALITY_TEXT,