Add new api to gtk.symbols
Add new api to gtk.symbols

Add newly added api gtk_accessible_set_widget() and
gtk_message_dialog_get_message_area()

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