[coq] Overlay for coq/coq#13617
You may likely want to make this change conditional on Coq's version, but it is out of my autoconf skills.
GitLab upgrade completed. Current version is 18.3.6
https://about.gitlab.com/releases/2025/07/17/gitlab-18-2-released/
https://about.gitlab.com/releases/2025/08/21/gitlab-18-3-released/
You may likely want to make this change conditional on Coq's version, but it is out of my autoconf skills.