[Merge] ~codyshepherd/livecd-rootfs/+git/livecd-rootfs:tarball-transform into livecd-rootfs:ubuntu/xenial

[Cody Shepherd]

Here is the base manifest diff between the current production build (20201026) and my test build from these changes (20201026.1): https://pastebin.ubuntu.com/p/yxkqBKhhKn/
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https://code.launchpad.net/~codyshepherd/livecd-rootfs/+git/livecd-rootfs/+merge/392066
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