gio-2.0, gio-unix-2.0: Update to 2.39.1
gdk-3.0, gtk+-3.0: Update to 3.11.1+
gtk+-3.0: Update to 3.11.2
clutter-1.0: Update to 1.16.2
codegen: Zero length of arrays when transferring ownership

This allows var data = (owned) aGenericArray.data;
without later setting data.len = 0 manually.
libpeas-gtk-1.0: Add bindings based on 1.8.1
libnotify: Switch to GIR