Manually build the srpm for the copr CI
    
    I'm not sure what changed but copr was building the
    srpm using the upstream tarball and not the current git
    checkout so it wasn't actually testing anything.
    
    copr now uses the manual make srpm method instead, as
    documented at
    https://docs.pagure.org/copr.copr/user_documentation.html#make-srpm
    
    Use configure.ac to determine the current version.
    
    Signed-off-by: Rob Crittenden <rcritten@redhat.com>