LXC: controller: change the owner of disk to the root of container

These disk devices are created for container,
the owner should be the root user of container.
Signed-off-by: NGao feng <gaofeng@cn.fujitsu.com>

src/lxc/lxc_controller.c

@@ -1369,6 +1369,9 @@ static int virLXCControllerSetupDisk(virLXCControllerPtr ctrl,
         goto cleanup;
     }
 
+    if (virLXCControllerChown(ctrl, dst) < 0)
+        goto cleanup;
+
     /* Labelling normally operates on src, but we need
      * to actally label the dst here, so hack the config */
     def->src = dst;