Log Message:
py-dbus, dbus-python-common: Update to 1.2.8

D-Bus Python Bindings 1.2.8 (2018-05-04)
========================================

The “cursed ice surface” release.

Dependencies:

• Documentation requires Sphinx and the readthedocs theme
• Documentation no longer requires epydoc

Enhancements:

• Build documentation with Sphinx instead of epydoc

• Remove obsolete COMPAT.txt, documenting compatibility breaks in
  versions over a decade old

Fixes:

• Make sure $(builddir)/test exists before creating .test files there

• Add PKG-INFO and egg_info to dist tarballs so they can be uploaded
  to PyPI again