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)
Apply pyempathy.patch and pyempathygtk.patch

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