Uprev grub and shim packages to new versions. The packages (grub
in particullar) went through a major restructuring, including
name change in output binary packages. This commit updates
build tools and files to be aware of new names and handle the
new packages
Change-Id: I89636218bdb8e97d39e69e764ae376b643657f50
Depends-On: https://review.openstack.org/#/c/578440
3a37c7feed