[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:

  c902058... build: custom GTK3 compilation for the Windows installer.
  665e153... build: compile GTK with new Windows Pointer Input Stack sup
  8cfa79f... Test with --ignore-whitespace
  511b591... Add --binary.

Commits added to the branch:

  ad86717... build: custom GTK3 compilation for the Windows installer. (*)
  74f67c1... build: compile GTK with new Windows Pointer Input Stack sup (*)
  8c08532... Test!

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