MFH: r481064

www/gitlab-ce security update to 11.3.1.
For more details please see here:
https://about.gitlab.com/2018/10/01/security-release-gitlab-11-dot-3-dot-1-released/

Approved by: mentors (implicit)
MFC after: 0d
Security: 065b3b72-c5ab-11e8-9ae2-001b217b3468

Approved by: ports-secteam (miwi)