www/gitlab-workhorse: Update from 0.7.5 to 0.7.8

v0.7.8

• Send artifact zip file entries via the 'senddata' mechanism.

v0.7.7

• Add the protocol used (HTTP) to each gitCommand call in order to check for restricted protocol access on GitLab's side.

v0.7.6

• Add the capability to inject git format-patch output.

Approved by: swills (mentor)