LXC: Change the owner of live attached disk device

The owner of this disk device should be the root user of container.
Signed-off-by: NGao feng <gaofeng@cn.fujitsu.com>

src/lxc/lxc_driver.c

@@ -3258,6 +3258,10 @@ lxcDomainAttachDeviceDiskLive(virLXCDriverPtr driver,
                              dst);
         goto cleanup;
     }
+
+    if (lxcContainerChown(vm->def, dst) < 0)
+        goto cleanup;
+
     created = true;
 
     /* Labelling normally operates on src, but we need