• Fix atexit() linking error

    From Rob Swindell@VERT to GitLab note in main/sbbs on Fri Aug 1 15:00:14 2025
    https://gitlab.synchro.net/main/sbbs/-/merge_requests/562#note_7462

    Yeah, no problem, there was an unrelated issue with some of the gitlab-runners, but that appears resolved now, so MRs should go through more quickly now.

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