Move grub config into xen-utils-common
The grub config snippet is not arch dependent, neither version
dependent, so it has to move into a 'common' package.
The packages with a version number in their name only have contents that
do not conflict with a previous or next version. Having this file in the
version dependent xen-hypervisor package currently prevents us from
being able to co-install the current and next version of Xen.
So, I can do this here for new packages in unstable but that will only
fix upgrades from xen 4.9 to 4.10. The same change still needs to go
into a stable update to solve the problem for upgrades from Stretch to
Buster.
Also see https://bugs.debian.org/852545
projects / xen.git / commit