See #11567.
Furthermore, it renames pythonPackages.dbus to pythonPackages.dbus-
python as that's the name upstream uses.
There is a small rebuild but I couldn't figure out the actual cause.
Because:
1. It is a mere alias of `pythonPackages.sip`
2. It is usually not needed since propagated by `pyqt4`
3. It makes it easy to have a packages depend on two different versions
of sip