IVGCVSW-7024 Add missing license info for reuse lint

Signed-off-by: Jim Flynn <jim.flynn@arm.com>
Change-Id: I97dee6982e0a7be01c13e9e803c0997547a39ff1
diff --git a/python/pyarmnn/.gitignore b/python/pyarmnn/.gitignore
index 69e2681..1120181 100644
--- a/python/pyarmnn/.gitignore
+++ b/python/pyarmnn/.gitignore
@@ -1,7 +1,11 @@
+#
+# Copyright © 2020 Arm Ltd and Contributors. All rights reserved.
+# SPDX-License-Identifier: MIT
+#
+
 # Generated pyarmnn files
 src/pyarmnn/_generated/*
 !src/pyarmnn/_generated/.keep
 !src/pyarmnn/_generated/*.py
 !src/pyarmnn/_generated/*.cpp
 **/include
-