1.1.18-1 - Update for new upstream tarball
    
    ... for point release: Pacemaker-1.1.18,
    for full details, see included ChangeLog file or
    https://github.com/ClusterLabs/pacemaker/releases/tag/Pacemaker-1.1.18
    
    Make -libs-devel package dependencies arch-qualified
    (-cts hasn't been switched at this time, pending further cleanup)
    
    Signed-off-by: Jan Pokorný <jpokorny@redhat.com>