Merge remote-tracking branch 'sstabellini/saverestore-8' into staging

Merge remote-tracking branch 'sstabellini/saverestore-8' into staging

* sstabellini/saverestore-8:
  xen: do not allocate RAM during INMIGRATE runstate
  xen mapcache: check if memory region has moved.
  xen: record physmap changes to xenstore
  Set runstate to INMIGRATE earlier
  Introduce "xen-save-devices-state"
  cirrus_vga: do not reset videoram

Conflicts:
	qapi-schema.json

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>