[gjs] (2 commits) Non-fast-forward update to branch wip/smcv/issue319

[Simon McVittie <smcv src gnome org>]

The branch 'wip/smcv/issue319' 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:

  eaa164a... function: Don't assume FFI argument always matches GIArgume

Commits added to the branch:

  a9c6d17... CI: Make iwyu idempotent (*)
  4bcb5c6... function: Don't assume FFI argument always matches GIArgume

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