dom0: set static-max for dom0

To make 'xl mem-set 0 <size>' happy.

dom0/init.d/qubes_core

@@ -39,6 +39,8 @@ start()
     mkdir -p /var/run/xen-hotplug
 
     xenstore-write /local/domain/0/name Domain-0
+    DOM0_MAXMEM=`/usr/sbin/xl info | grep total_memory | awk '{ print $3 }'`
+    xenstore-write /local/domain/0/memory/static-max $[ $DOM0_MAXMEM * 1024 ]
     
     xl sched-credit -d 0 -w 512
     cp /var/lib/qubes/qubes.xml /var/lib/qubes/backup/qubes-$(date +%F-%T).xml