[Merge] ~utkarsh/livecd-rootfs/+git/livecd-rootfs:add-buildinfo-file into livecd-rootfs:ubuntu/master

[Utkarsh Gupta]

> I think you still need to `mkdir -p chroot/etc/cloud` though

I don't think that was needed but it's best if we add. So I've done that now. :)
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https://code.launchpad.net/~utkarsh/livecd-rootfs/+git/livecd-rootfs/+merge/461713
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