debian/.gitlab-ci.yml: Disable reprotest until clang understands -ffile-prefix-map.

5 jobs for experimental in 24 minutes and 42 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Build
passed #222417
build

00:14:54

 
  Test
passed #222419
autopkgtest

00:06:25

passed #222420
blhc

00:01:33

passed #222418
lintian

00:02:01

passed #222421
piuparts

00:09:46