MFH: r481317

www/gitlab-ce security update to version 11.3.4.
For more details see here:
https://about.gitlab.com/2018/10/05/critical-security-release-11-3-4/

Approved by: mentors (implicit)
MFC after: 1d
Security: do not have it by hand

Approved by: ports-secteam (miwi)