software/gitlab: use gitlab-ce with a fix for mimemagic build

see gitlab-ce!5
2 jobs for fix/repair-sr-tests in 0 seconds
Status Job ID Name Coverage
  External
passed SlapOS.SoftwareReleases.IntegrationTest-Jerome-Python3

15:01:33

passed SlapOS.SoftwareReleases.IntegrationTest-Jerome-WIP

19:23:08