(bug 57395) Add AbuseFilter rights to sysops on fiwiki

This patch adds 'abusefilter-modify-restricted' and
'abusefilter-revert' user rights to the 'sysop' group
on the Finnish Wikipedia per bug request.

Bug: 57395
Change-Id: Ie59a4dad896bcb427968a262c91cf4492e2264d4