Fixes issues when memory is >= 3584.
* gnu/services/virtualization.scm (hurd-vm-shepherd-service):
When type is 'hurd64-qcow2 add -M q35 to qemu arguments.
Change-Id: I58ea603faad545294aad52b71aac82c922fd9b96
Signed-off-by: Ludovic Courtès <ludo@gnu.org>