[cogl] (8 commits) Non-fast-forward update to branch issue-14

[Emmanuele Bassi <ebassi src gnome org>]

The branch 'issue-14' 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:

  bcc0d79... Free state after freeing its contents

Commits added to the branch:

  3aef853... ci: Add naive CI (*)
  0e9b453... Apply suggestion to .gitlab-ci.yml (*)
  0ef0219... ci: Add Xvfb and run the tests under it (*)
  b36dc0a... ci: Drop _FORTIFY_SOURCE (*)
  d2313a9... ci: Force GLX renderer (*)
  134ac2f... ci: Disable test suite (*)
  92d2741... Merge branch 'simple-ci' into 'cogl-1.22' (*)
  9ad01b0... Free state after freeing its contents

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