tree decbabfd90e1567b6751197e9ec6b30610dc5055
parent db7b8602816ed6230d21ae055be5fda55549fb50
author Tom Rini <trini@konsulko.com> 1570205574 -0400
committer Tom Rini <trini@konsulko.com> 1570551038 -0400

gitlab-ci: Switch to Ubuntu 18.04 image

In order to run all filesystem tests we need to have newer ext4 tools,
move up to Ubuntu 18.04 'bionic' for our base.  We need to change
slightly how we invoke the provided grub-mkimage.  This will also make
future python3 work easier.

Signed-off-by: Tom Rini <trini@konsulko.com>