gitlab-module: fix hooks links for older repositories

nixos/modules/services/misc/gitlab.nix

···
           touch "${cfg.statePath}/db-seeded"
         fi
 
+        # The gitlab:shell:create_hooks task seems broken for fixing links
+        # so we instead delete all the hooks and create them anew
+        rm ${cfg.statePath}/repositories/**/*.git/hooks
+        ${gitlab-rake}/bin/gitlab-rake gitlab:shell:create_hooks RAILS_ENV=production
+
         # Change permissions in the last step because some of the
         # intermediary scripts like to create directories as root.
         chown -R ${cfg.user}:${cfg.group} ${cfg.statePath}