added multimedia repos to ci

1 job for master in 15 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
failed #154
buildtest

00:00:15

 
Name Stage Failure
failed
buildtest Test There is an unknown failure, please try again
HEAD is now at f826a10 Merge branch 'master' of git.fsmpi.rwth-aachen.de:videoaginfra/ffworker
From https://git.fsmpi.rwth-aachen.de/videoaginfra/ffworker
f826a10..edeea7c master -> origin/master
Checking out edeea7c2 as master...
Skipping Git submodules setup
$ echo "deb http://www.deb-multimedia.org stretch main non-free" >> /etc/apt/sources.list
$ wget https://www.deb-multimedia.org/pool/main/d/deb-multimedia-keyring/deb-multimedia-keyring_2016.8.1_all.deb
/bin/bash: line 53: wget: command not found
ERROR: Job failed: exit code 1