comps-f30: electronic-lab: add python-migen package
    
    Migen enables hardware designers to take advantage of the richness of
    Python (object oriented programming, function parameters, generators,
    operator overloading, libraries, etc.), to build well organized, reusable
    and elegant digital hardware designs.
    Also see https://src.fedoraproject.org/rpms/python-migen
    
    Signed-off-by: Gabriel Somlo <gsomlo@gmail.com>