Fixed: chroot-installation_stretch_install_kde_upgrade_to_buster/11

[jenkins]

See 
https://jenkins.debian.net/job/chroot-installation_stretch_install_kde_upgrade_to_buster/11//console
 or just 
https://jenkins.debian.net/job/chroot-installation_stretch_install_kde_upgrade_to_buster/11/
 for more information.