Updating Copyright line to Open Networking Foundation

Change-Id: Icba96d7f39a065b53f34a6aeb71afd1f7d51f774
diff --git a/tools/dev/header.txt b/tools/dev/header.txt
index f19f002..395ba13 100644
--- a/tools/dev/header.txt
+++ b/tools/dev/header.txt
@@ -1,4 +1,4 @@
-Copyright ${today.year}-present Open Networking Laboratory
+Copyright ${today.year}-present Open Networking Foundation
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.