convert to alpine-gitlab-ci

3 jobs for adopt-to-gitlab in 59 seconds (queued for 6 seconds)
Status Job ID Name Coverage
  Build
passed #474
s390x docker-alpine
build-s390x

00:00:59

passed #476
x86 docker-alpine
build-x86

00:00:35

passed #475
x86_64 docker-alpine
build-x86_64

00:00:28