Add Gitlab CI config file

8 jobs for master in 22 minutes and 38 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Build
passed #279794
build

00:03:12

 
  Test
passed #279799
autopkgtest

00:04:00

passed #279800
blhc

00:01:49

passed #279798
lintian

00:01:48

passed #279801
piuparts

00:03:34

passed #279797
reprotest

00:02:35

passed #279796
test-build-all

00:02:30

passed #279795
test-build-any

00:03:06