Comment 0 for bug 1830823

This commit https://git.launchpad.net/livecd-rootfs/commit/debian/control?h=ubuntu/xenial&id=b8b2e343827adb9020d5b71f232c0361bd72685f added a depends on ubuntu-image but that package is not available on xenial for powerpc. So powerpc image builds are failing. :(