Fixup ldconfig scriptlets
    
    %ldconfig is not defined on F28+, so it's evaluated to "%ldconfig" as is
    which is not valid shell command..
    
    Fixes:
    /var/tmp/rpm-tmp.RKCplJ: line 1: fg: no job control
    
    Signed-off-by: Igor Gnatenko <ignatenkobrain@fedoraproject.org>