Scan gdk/x11 sources for Gdk-3.0.gir
Scan gdk/x11 sources for Gdk-3.0.gir

The doc comments (with annotations) for some of the gdk api are down
in x11/ sources, so we need to scan those too, when building Gdk-3.0.gir.

johne53/MB3Gtk-2,johne53/MB3Gtk-2,Distrotech/gtk,Distrotech/gtk,johne53/MB3Gtk-2,johne53/MB3Gtk-2,Unity-Technologies/gtk,johne53/MB3Gtk-2,Unity-Technologies/gtk,Unity-Technologies/gtk,Distrotech/gtk,Distrotech/gtk,Unity-Technologies/gtk,Unity-Technologies/gtk,Distrotech/gtk