Add missing requires to 'common' and 'daemon' subpackage
    
    Both subpackages call various %systemd scriptlets, so they need
    the %systmd_requires macro. Their %triggerpostun also call
    systemctl directly, so add an explicit Requires on that.
    
    Some of this may in practice prove redundant, but let's be explicit
    and hopefully more robust.
    
    Signed-off-by: Tom Gundersen <teg@jklm.no>