Fix failing autopkgtest and add gitignore file.

6 jobs for debian/3.23.4-6 in 14 minutes and 25 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Build
passed #121857
build

00:06:18

 
  Test
passed #121860
autopkgtest

00:05:59

passed #121861
blhc

00:01:22

passed #121859
lintian

00:02:05

passed #121862
piuparts

00:03:42

passed #121858
reprotest

00:08:07