app-emulation/openstack-guest-agents-unix: add patch for test failures

The tests fail but a patch has been added upstream.  This change adds
that patch to the build.
dev-python/sphinxcontrib-cheeseshop: add python3_4 target
dev-python/sphinxcontrib-cheeseshop: drop setup.py patch
app-emulation/openstack-guest-agents-unix: add eutils
dev-python/sphinxcontrib-cheeseshop: add setup.py patch
dev-python/sphinxcontrib-cheeseshop: add to tree