Fixed: chroot-installation_stretch_install_qt5_upgrade_to_sid_aptdpkg_first/58

[jenkins]

See 
https://jenkins.debian.net/job/chroot-installation_stretch_install_qt5_upgrade_to_sid_aptdpkg_first/58//console
 or just 
https://jenkins.debian.net/job/chroot-installation_stretch_install_qt5_upgrade_to_sid_aptdpkg_first/58/
 for more information.