Retry deb:build if it fails

deb:build seems to fail a lot on the first try. Should look into that,
this is a lazy fix for the time being
3 jobs for master in 3 minutes and 58 seconds (queued for 1 second)
Status Job ID Name Coverage
  Check For Updates
passed #8000
checkupdates:gradle

00:00:40

 
  Build
passed #8001
docker-builder
build-docker

00:02:15

 
  Cleanup
passed #8002
deb:cleanup

00:01:02