gitlab-ci: auto-cancel CI runs when a newer commit is pushed to the same branch

Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Acked-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Michel Dänzer <mdaenzer@redhat.com>
2 files changed