gio: Fix-up capitalisation of several property types
gio: Fix-up capitalisation of several property types

For properties, the parser guesses the type name from an all-caps macro
name. So if the GType has a funny name, like dbus -> DBus, the property
type is wrong.

antoniusriha/gtk-sharp,antoniusriha/gtk-sharp,akrisiun/gtk-sharp,Gankov/gtk-sharp,openmedicus/gtk-sharp,akrisiun/gtk-sharp,openmedicus/gtk-sharp,Gankov/gtk-sharp,sillsdev/gtk-sharp,Gankov/gtk-sharp,sillsdev/gtk-sharp,openmedicus/gtk-sharp,openmedicus/gtk-sharp,antoniusriha/gtk-sharp,sillsdev/gtk-sharp,Gankov/gtk-sharp,akrisiun/gtk-sharp,akrisiun/gtk-sharp,orion75/gtk-sharp,akrisiun/gtk-sharp,antoniusriha/gtk-sharp,orion75/gtk-sharp,antoniusriha/gtk-sharp,openmedicus/gtk-sharp,sillsdev/gtk-sharp,Gankov/gtk-sharp,openmedicus/gtk-sharp,orion75/gtk-sharp,Gankov/gtk-sharp,orion75/gtk-sharp,openmedicus/gtk-sharp,orion75/gtk-sharp,sillsdev/gtk-sharp