Title: #188: Move Python build artefacts to top level directory
I ran into some issues with ```make rpm```. ```setup.py``` started to pick up
build artefacts of other packages. Now every package uses its own subdirectory
under the top-level ```build``` directory.
See the full comment at
Manage your subscription for the Freeipa-devel mailing list:
Contribute to FreeIPA: http://www.freeipa.org/page/Contribute/Code