[gnome-build-meta] (2 commits) Non-fast-forward update to branch jjardon/new_docker_images

[Jordan Petridis <jpetridis src gnome org>]

The branch 'jjardon/new_docker_images' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  8a0f5a6... .gitlab-ci.yml: Use new docker images with buildstream and 

Commits added to the branch:

  0b9f4af... .gitlab-ci.yml: Use new docker images with buildstream and 
  a5b9b79... ci: update bst and bst-external versions