Almost everything that needs gioenumtypes.h also needs
gobjectenumtypes.h. Fixes:

ccache cc @gio/win32/gio@win32@@giowin32@sta/gwin32filemonitor.c.obj.rsp
In file included from ../gio/win32/gwin32filemonitor.h:25:0,
                 from ../gio/win32/gwin32filemonitor.c:26:
../glib/glib-object.h:37:10: fatal error: gobject/gobjectenumtypes.h: No such file or directory
 #include <gobject/gobjectenumtypes.h>
          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~