MFH: r483457 r483459

One of the last dependency updates gitlab-ce requires, has broken the Gemfile.lock generation for user git.
I use now a work-around to generate the file as user root and change the ownership back to git.
This commit can maybe be undone if the source of the problem is fixed.

PR: 232791
Reported by: freebsd@felix.flornet.de
Approved by: mentors (implicit)
MFC after: 1 day

www/gitlab-ce security update to version 11.3.8.

Approved by: mentors (implicit)
MFC after: 1 day
Security: b9591212-dba7-11e8-9416-001b217b3468

Approved by: ports-secteam (miwi)