Upgrade to Fedora's dracut 055
    
    This fixes the removal of duplicate files from the squash image in 053,
    which did not expand variables due to single-quoting
    
    See:
    https://github.com/dracutdevs/dracut/commit/95ea16aa606912b7cc8f9942481c8a889b640c15
    https://github.com/dracutdevs/dracut/commit/8f7c332e488f88e5845a3c7954af7934c2f1e37b
    
    Signed-off-by: Michel Alexandre Salim <salimma@centosproject.org>