scripts: add missing lincense in scripts/gen_app_partitions.py

Add missing lincense header in scripts/gen_app_partitions.py

Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
diff --git a/scripts/gen_app_partitions.py b/scripts/gen_app_partitions.py
index e5d5907..b8b407c 100644
--- a/scripts/gen_app_partitions.py
+++ b/scripts/gen_app_partitions.py
@@ -1,4 +1,9 @@
 #!/usr/bin/env python3
+#
+# Copyright (c) 2018 Intel Corporation
+#
+# SPDX-License-Identifier: Apache-2.0
+
 import sys
 import argparse
 import os