multiqueue: Wake up on reconfigure event
multiqueue: Wake up on reconfigure event

After patch bda406c4, the state of the singlequeue was set to OK, but nothing
would then wake up the thread, as the other wakeup functions only look at
singlequeues that are marked as having received as not-linked.

https://bugzilla.gnome.org/show_bug.cgi?id=708200

justinjoy/gstreamer,justinjoy/gstreamer,justinjoy/gstreamer,justinjoy/gstreamer,justinjoy/gstreamer