glib: fix glue build
glib: fix glue build

Oops, this fixes:
/opt/gnome/include/glib-2.0/glib/gtypes.h:28:2:
error: #error "Only <glib.h> can be included directly.

sillsdev/gtk-sharp,sillsdev/gtk-sharp,sillsdev/gtk-sharp,sillsdev/gtk-sharp,sillsdev/gtk-sharp