“-cpu host” can sometimes, for unclear reasons, lead to this error from
QEMU 8.1.1:
qemu-system-x86_64: CPU model 'host' requires KVM or HVF
This commit fixes it.
Inspired by
<47b56e7c19>.
* gnu/tests/virtualization.scm (run-childhurd-test)[test]: Prefer
“-cpu max” over “-cpu host”.
Change-Id: I11a8a68bb0532fe1f3fd2c34b4a7a5fdb7bccb57