[gimp] (6 commits) Non-fast-forward update to branch wip/Jehan/ninja-test

[Jehan <jehanp src gnome org>]

The branch 'wip/Jehan/ninja-test' 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:

  a4b62f1... build: use POSIX test syntax.
  29737e3... build: xvfb-run call from meson fails.
  98a97ab... build: fix again the `xvfb-run` call to work on various dis
  eeb59d5... build: test.
  edf6233... Test.

Commits added to the branch:

  4282d6f... Update Latvian translation (*)
  3973cde... Update Latvian translation (*)
  1388b07... Update Latvian translation (*)
  9bc9ef0... build: use POSIX test syntax. (*)
  588ff7c... build: xvfb-run call from meson fails. (*)
  67337fd... build: fix again the `xvfb-run` call to work on various dis

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