[Merge] ~codyshepherd/livecd-rootfs/+git/livecd-rootfs:buildd/hide-grub-menu-bb into livecd-rootfs:ubuntu/bionic

[Cody Shepherd]

The proposal to merge ~codyshepherd/livecd-rootfs/+git/livecd-rootfs:buildd/hide-grub-menu-bb into livecd-rootfs:ubuntu/bionic has been updated.

Commit message changed to:

Add grub config to buildd images to enable use with lxd vms

For more details, see:
https://code.launchpad.net/~codyshepherd/livecd-rootfs/+git/livecd-rootfs/+merge/398899
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Your team Ubuntu Core Development Team is requested to review the proposed merge of ~codyshepherd/livecd-rootfs/+git/livecd-rootfs:buildd/hide-grub-menu-bb into livecd-rootfs:ubuntu/bionic.