example_contact_list_manager_authorize_publication_async: build set additively
example_contact_list_manager_authorize_publication_async: build set additively

This makes the logic much easier to follow.

Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib,Distrotech/telepathy-glib