restore: Run setup-ns scripts before restoring them

We should call external scripts when namespaces are created,
but before we try to fill them with data from images.

This is done so e.g. to make it possible to push external net
links to netns.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

cr-restore.c

@@ -1263,6 +1263,9 @@ static int restore_task_with_children(void *_arg)
 
 	/* Restore root task */
 	if (current->parent == NULL) {
+		if (restore_finish_stage(CR_STATE_RESTORE_NS) < 0)
+			exit(1);
+
 		if (collect_mount_info(getpid()))
 			exit(1);
 
@@ -1277,9 +1280,6 @@ static int restore_task_with_children(void *_arg)
 		if (mount_proc())
 			exit(1);
 
-		if (restore_finish_stage(CR_STATE_RESTORE_NS) < 0)
-			exit(1);
-
 		if (root_prepare_shared())
 			exit(1);
 	}