[commit: ghc] master's head updated: Update .gitlab-ci.yml (c7a84a6)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

Branch 'master' now includes:

     b832689 gitlab-ci: Always build fedora27
     acf2129 gitlab-ci: Implement head.hackage jobs
     71648c3 gitlab-ci: Implement support for i386/Windows bindists
     d94ca74 err: clean up error handler
     398f2cb Bump Cabal submodule to 3.0
     89a201e users-guide: Update Wiki URLs to point to GitLab
     98ff1a5 Replace nOfThem by replicate
     6a47414 Fix typos
     1e26e60 Simplify monadic code
     c045bd7 Remove deprecated reinitializeGlobals
     6d19ad7 gitlab-ci: Bump docker images
     c7a84a6 Update .gitlab-ci.yml