Security update to 11.8.1.
For more details please see here:
https://about.gitlab.com/2019/03/04/security-release-gitlab-11-dot-8-dot-1-released/

This release will not be MFHed to 2019Q1 due to breaking other ports and therefor to many commits have to be MFHed.

Security: 11292460-3f2f-11e9-adcb-001b217b3468