[mutter] (4 commits) Non-fast-forward update to branch wip/3v1n0/ci-norebuilds

[Marco Trevisan <marcotrevi src gnome org>]

The branch 'wip/3v1n0/ci-norebuilds' 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:

  03d3da8... gitlab-ci: Use artifacts to keep built data and reuse in te
  c0c8827... gitlab-ci: Use runtime dir owned only by current user

Commits added to the branch:

  2528a39... gitlab-ci.yml: Change build step build type to debugoptimiz (*)
  93d5662... gitlab-ci: Use artifacts to keep built data and reuse in te
  44c2a63... gitlab-ci: Use runtime dir owned only by current user
  1b6117f... gitlab-ci: Define exported global variables once

(*) This commit already existed in another branch; no separate mail sent