glib gir: include glib-enumtypes.h
Similarly to glib-types.h we should include glib-enumtypes.h which is new in glib 2.60.
We either need to bump the glib requirement or handle that the file can be missing.
Similarly to glib-types.h we should include glib-enumtypes.h which is new in glib 2.60.
We either need to bump the glib requirement or handle that the file can be missing.