[gimp] Non-fast-forward update to branch wip/Jehan/fixing-release-gimp-2-99-10-win

[Jehan <jehanp src gnome org>]

The branch 'wip/Jehan/fixing-release-gimp-2-99-10-win' 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:

  3970ee6... Revert "configure.ac, meson.build: post-release version bum
  0ac2b85... app: don't use build-time path for the desktop datadir.
  67fc358... build: bump the revision to use this CI build as new instal

Commits added to the branch:

  63a530f... app: don't use build-time path for the desktop datadir.