Add Copyright to .gitignore

Change-Id: Idaa12d74a312f4fe28b1023117e740eb8f9b2bcd
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/.gitignore b/.gitignore
index e0e1ed1..4f7530f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,6 @@
+#
+# Copyright ETSI Contributors and Others.
+#
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at