[gegl] (12 commits) Non-fast-forward update to branch wip/schumaml/fix-vapigen

[Michael Schumacher <schumaml src gnome org>]

The branch 'wip/schumaml/fix-vapigen' 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:

  788da1a... Fix vapigen call - assuming that babl is using the same dat

Commits added to the branch:

  9fb676a... Extend configure checks with checks for SDL2 (*)
  d0c939f... Port sdl-display to SDL2 (*)
  17f068e... Port sdl-draw example to SDL2 (*)
  7a2621b... tools: exp_combine fix signedness warning (*)
  fd361b3... gitlab-ci: set XDG_DATA_DIRS in environment for gegl build (*)
  4c561bd... gitlab-ci: use master if babl micro is odd (*)
  9d1e254... configure.ac: depend on babl-0.1.71 (*)
  00c2aad... gitlab-ci: do the min-babl checkout in a shell conditional (*)
  34dba25... gitlab-ci: attempt to use $() instead of `` inside arithmet (*)
  84ae94f... gitlab-ci: conditional execution for babl-min-version (*)
  71d8e28... opencl: in gegl_buffer_cl_iterator_next add gegl_buffer_set (*)
  80ffc8e... Fix vapigen call - assuming that babl is using the same dat

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