[gnome-builder] (7 commits) Non-fast-forward update to branch wip/chergert/flatpak-breakout

[Christian Hergert <chergert src gnome org>]

The branch 'wip/chergert/flatpak-breakout' 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:

  5d8e42e... sandboxing: add subprocess abstraction

Commits added to the branch:

  895c71f... egg: fix documentation typo
  73a4e8b... run-manager: check for non-NULL gvariant parameter
  3f982b5... run-manager: propagate error message from async run
  8e5a2c2... run-manager: check for non-NULL gvariant parameter
  ecb5a9e... runtime-manager: suppress events when unloading
  958286c... configuration: reduce emission of ::changed
  72288ff... sandboxing: add subprocess abstraction