To update python binding:
1)
  $ make distclean
  $ python /usr/share/pygtk/2.0/codegen/h2def.py libempathy/*.h > python/pyempathy/pyempathy.defs
  $ python /usr/share/pygtk/2.0/codegen/h2def.py libempathy-gtk/*.h > python/pyempathygtk/pyempathygtk.defs

2)
Manually modify pyempathy.defs, ContactList is not an object but an interface:
(define-interface ContactList
  (in-module "Empathy")
  (c-name "EmpathyContactList")
  (gtype-id "EMPATHY_TYPE_CONTACT_LIST")
)

ContactManager, TpChatroom and TpContactList implements ContactList interface:
  (implements "EmpathyContactList")

3)
Manually update headers in pyempathy.override and pyempathygtk.override.