Build: move version handling from Makefile to configure
    
    Version information is now in VERSION.m4 instead of VERSION.
    Makefile target version-update was minimized and configure can be run
    before make. Makefile temporarily contains hardcoded version which has
    to match the one specified in VERSION.m4.
    
    This is preparatory step which will allow us to replace hand-made
    Makefile with one generated by Automake.
    
    https://fedorahosted.org/freeipa/ticket/6418
    
    Reviewed-By: Martin Basti <mbasti@redhat.com>
    Reviewed-By: Christian Heimes <cheimes@redhat.com>