[gimp] Non-fast-forward update to branch wip/nielsdg/meson-fix-test-build

[Niels De Graef <nielsdg src gnome org>]

The branch 'wip/nielsdg/meson-fix-test-build' 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:

  ed27cc7... app/test-xcf: Use g_close() instead of close()

Commits added to the branch:

  9e0810e... app/test-xcf: include necessary headers for close()