mpris v2 test: add --no-embedded to recommended commandline for usage with SetVideoPostion().

test/dbus/mpris_v2.sh

@@ -24,7 +24,7 @@ verbose="--print-reply=3"
 medialist=$*
 if test -z "$medialist"; then
     echo "Provide a MRL for testing, eg: mpris_v1.sh file://myvideo.mpeg file://myvideo2.mpeg"
-    echo "Make sure vlc is started before running this test script, eg: vlc --extraintf=dbus"
+    echo "Make sure vlc is started before running this test script, eg: vlc --extraintf=dbus --no-embedded"
     exit 1
 fi