[gdm] Non-fast-forward update to branch benzea/wait-seat-graphical

[Benjamin Berg <bberg src gnome org>]

The branch 'benzea/wait-seat-graphical' 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:

  ab7c724... local-display-factory: Wait for seats to become graphical

Commits added to the branch:

  5cb3b1f... local-display-factory: Wait for seats to become graphical