sysstat: Update to version 12.5.4

sysstat: Update to version 12.5.4

- Update from 6.0.2 (2005) to 12.5.4 (2021)
- sysstat-6.0.2-sysconf.patch no longer required. Built into source as standard now.
- Update rootfile
   rootfile made the same as previous version. New options are available, such as
   pidstat and tapestat but they have been commented out in the rootfile. If required
   in the future they can be uncommented.
- iso that was built with this sysstat was installed into vm testbed and confirmed
   that all graphs working, especially those related to disk stats.
- Changelog is too large to show here. Full details for all previous versions can be
   found in the CHANGES file in the source tarball.
- At least 25 bugs fixed between the two versions.

Tested-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>