Comment 10 for bug 1729531

Verification for artful (1.3+16.04ubuntu2):

* Built a snap-based image with `ubuntu-image snap -d -O out/ pc-amd64.assertion` on a xenial cloud instance
* Confirmed that the image is booting on my host kvm
* Built a classic image with `sudo ubuntu-image classic -d -O tmp/ --project=ubuntu-cpc pc-amd64-gadget/prime/` on the same xenial instance
* Confirmed that the image is booting on my host kvm