LXC: controller: change the owner of /dev/pts and ptmx to the root of container

These files 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

@@ -1548,6 +1548,10 @@ virLXCControllerSetupDevPTS(virLXCControllerPtr ctrl)
         goto cleanup;
     }
 
+    if ((virLXCControllerChown(ctrl, ctrl->devptmx) < 0) ||
+        (virLXCControllerChown(ctrl, devpts) < 0))
+         goto cleanup;
+
     ret = 0;
 
 cleanup: