devel/gitlab-runner: allow FreeBSD to be used with Docker builds

Thanks to Tobias C. Berner <tcberner@gmail.com> for pointing to the MR.
For more details, see MR:
https://gitlab.com/gitlab-org/gitlab-runner/-/merge_requests/4551

Reported by: Tobias C. Berner <tcberner@gmail.com>

(cherry picked from commit 6c7de795fd4f0ed192859941b399c523f4ade99d)