Merge branch 'gitlab-runner-community' into 'master'

dockerfile: install gitlab-runner-helper from community

See merge request !3
5 jobs for master in 1 minute and 25 seconds (queued for 6 seconds)
Status Job ID Name Coverage
  Build
passed #399
docker-alpine s390x
build-s390x

00:00:24

passed #400
docker-alpine x86_64
build-x86_64

00:00:24

 
  Upload
passed #401
docker-alpine s390x
upload-s390x

00:00:33

passed #402
docker-alpine x86_64
upload-x86_64

00:00:29

 
  Manifest
passed #403
docker-alpine
create-manifest

00:00:26