[gnome-games] Non-fast-forward update to branch wip/exalm/subprocess

[Alexander Mikhaylenko <alexm src gnome org>]

The branch 'wip/exalm/subprocess' 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:

  5829ee3... Adapt for subprocess libretro

Commits added to the branch:

  283631a... Adapt for subprocess retro-gtk