frr: Update to version 8.5.2

frr: Update to version 8.5.2

- Update from version 8.0.1 to 8.5.2
- Update of rootfile
- tar.xz versions are no longer provided by the developers. They onl provide the tar.gz
   that is automatically created by github. This started shortly after 8.0.1 was released
- Changelog is too large to include here. For full details see the changelog details at
   https://github.com/FRRouting/frr/releases

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>