Add extra line about src files are part of RIC platform project

Signed-off-by: Timo Tietavainen <timo.tietavainen@nokia.com>
Change-Id: Idf0de8c3b3c8133847f14d0d0b1b38a68fcb2c67
diff --git a/include/private/system.hpp b/include/private/system.hpp
index 1f6b570..b26fb84 100644
--- a/include/private/system.hpp
+++ b/include/private/system.hpp
@@ -14,6 +14,11 @@
    limitations under the License.
 */
 
+/*
+ * This source code is part of the near-RT RIC (RAN Intelligent Controller)
+ * platform project (RICP).
+*/
+
 #ifndef SHAREDDATALAYER_SYSTEM_HPP_
 #define SHAREDDATALAYER_SYSTEM_HPP_