Applied security upgrade to gitlab 10.7.5.
Fixed bug with wrong path for gitlab-workhouse that should fix artifacts (reported by Felix <mail@felix.flornet.de>). This was fix upstream but is not included in this version yet: https://gitlab.com/gitlab-org/gitlab-ce/issues/46763
Update net/rubygem-grpc to 1.11.1 which is required for gitlab 10.7.5.
Sync dep net/rubygem-grpc with gitlab which uses now 1.11.1.
Added gitlab-pages again to dependencies as the new version builds again.

Reported by: Felix <mail@felix.flornet.de>
Reviewed by: swills (mentor)
Approved by: swills (mentor)
Differential Revision: https://reviews.freebsd.org/D15631