Add Gitlab CI config file

8 jobs for master in 24 minutes and 31 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Build
passed #278496
build

00:03:26

 
  Test
passed #278501
autopkgtest

00:04:12

passed #278502
blhc

00:01:33

passed #278500
lintian

00:02:03

passed #278503
piuparts

00:04:19

passed #278499
reprotest

00:02:47

passed #278498
test-build-all

00:03:10

passed #278497
test-build-any

00:02:58