[gimp] (3 commits) Non-fast-forward update to branch wip/Jehan/incremental-win-installer-improvements

[Jehan <jehanp src gnome org>]

The branch 'wip/Jehan/incremental-win-installer-improvements' 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:

  71e84a8... build: test.

Commits added to the branch:

  179334b... build: do not copy a binary dependency when it already exis (*)
  62b332e... Update Swedish translation (*)
  8edec4f... build: custom GTK3 compilation for the Windows installer.

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