[gimp] (3 commits) Non-fast-forward update to branch wip/Jehan/fix-language-detect

[Jehan <jehanp src gnome org>]

The branch 'wip/Jehan/fix-language-detect' 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:

  f9e735f... app: detect system language with a more robust logic.

Commits added to the branch:

  07cd09e... gitignore: hide various files copied by the autogen.sh step (*)
  e601a6c... Change GTK+ to GTK (*)
  d7fe25b... app: detect system language with a more robust logic.

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