[gdm] Non-fast-forward update to branch wip/fix-login-screan-reaping

[Ray Strode <halfline src gnome org>]

The branch 'wip/fix-login-screan-reaping' 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:

  40de28b... gdm-{wayland,x}-session: protect more session variables
  b606aed... session-worker: don't kill progress group until PostSession
  4860586... local-display-factory: reap login session on vt switch to r

Commits added to the branch:

  2f5c9a9... local-display-factory: reap login session on vt switch to r