Emit GObject::notify on HildonLiveSearch:text changes
Emit GObject::notify on HildonLiveSearch:text changes

Since HildonLiveSearch:text is a proxy for GtkEntry:text, it
makes sense to do it in the handler for GtkEntry::changed.

archlinuxarm-n900/libhildon,archlinuxarm-n900/libhildon,community-ssu/hildon,community-ssu/hildon,archlinuxarm-n900/libhildon,community-ssu/hildon