ostree: Work around threadsafety issue with g_get_language_names.
ostree: Work around threadsafety issue with g_get_language_names.

ikeydoherty/appstream-glib,hughsie/appstream-glib,hughsie/appstream-glib,ximion/appstream-glib,ximion/appstream-glib,hughsie/appstream-glib,ikeydoherty/appstream-glib,ximion/appstream-glib