Build: Makefiles for Python packages
    
    This version builds only one version of Python packages. If you want to
    build for Python 2 & 3 call configure twice using different --with-python
    or specify PYTHON variable when calling make.
    
    dist-hook is using SOURCES.txt file from egg-info.
    According to Petr Viktorin this should be enough for our purposes
    and avoids need to create plugins for setuptools.
    
    Currently VPATH builds do not work for various reasons.
    This should be fixed later on.
    
    Most credit goes to these guys:
     Christian Heimes <cheimes@redhat.com>
     Petr Viktorin <pviktori@redhat.com>
     Kevin Brown <kevin@kevin-brown.com>
    
    https://fedorahosted.org/freeipa/ticket/6418
    
    Reviewed-By: Martin Basti <mbasti@redhat.com>
    Reviewed-By: Christian Heimes <cheimes@redhat.com>