[gdm] Non-fast-forward update to branch wip/fix-autologin-when-not-vt1

[Ray Strode <halfline src gnome org>]

The branch 'wip/fix-autologin-when-not-vt1' 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:

  fddb6c2... session-worker: run PostSession on reboot
  31cfb84... session-worker: ensure initial vt is never picked for !is_i

Commits added to the branch:

  9abcffb... session-worker: ensure initial vt is never picked for !is_i