[gnome-builder] (3 commits) Non-fast-forward update to branch flatpak-cache

[Jordan Petridis <jpetridis src gnome org>]

The branch 'flatpak-cache' 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:

  c1488c9... gitlabci: use ccache to speedup the build.

Commits added to the branch:

  2bbdb50... versioning: fix broken versioning macros (*)
  1d8341d... gitlabci: assume "image:" key compatible executor. (*)
  2a43b4e... gitlabci: use ccache to speedup the build times.

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