[gdm] (3 commits) Non-fast-forward update to branch wip/fix-double-greeters

[Ray Strode <halfline src gnome org>]

The branch 'wip/fix-double-greeters' 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:

  ca14628... Add CI to GDM.
  8b163aa... Merge branch 'wip/nielsdg/add-ci' into 'master'
  6243885... local-display-factory: add more debug messages to new vt ha
  0a79b55... local-display-factory: don't start two greeters at startup
  9f89861... session-worker: don't switch VTs if we're already on the ri

Commits added to the branch:

  dd55e47... local-display-factory: add more debug messages to new vt ha
  19b6065... local-display-factory: don't start two greeters at startup
  f6a08da... session-worker: don't switch VTs if we're already on the ri