[gnome-builder] (2 commits) Non-fast-forward update to branch wip/chergert/debugger

[Christian Hergert <chergert src gnome org>]

The branch 'wip/chergert/debugger' 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:

  d389eae... debugger: stub out debugger

Commits added to the branch:

  641cf88... editor: add IdeEditorViewAddin::load_source_view and unload (*)
  833e3c2... debugger: stub out debugger API

(*) This commit already existed in another branch; no separate mail sent