Update copyright notices for 2018

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
diff --git a/sigma_dut.c b/sigma_dut.c
index 3b3dbba..a42e294 100644
--- a/sigma_dut.c
+++ b/sigma_dut.c
@@ -2,6 +2,7 @@
  * Sigma Control API DUT (station/AP)
  * Copyright (c) 2010-2011, Atheros Communications, Inc.
  * Copyright (c) 2011-2017, Qualcomm Atheros, Inc.
+ * Copyright (c) 2018, The Linux Foundation
  * All Rights Reserved.
  * Licensed under the Clear BSD license. See README for more details.
  */
@@ -705,6 +706,7 @@
 "\n"
 "Copyright (c) 2010-2011, Atheros Communications, Inc.\n"
 "Copyright (c) 2011-2017, Qualcomm Atheros, Inc.\n"
+"Copyright (c) 2018, The Linux Foundation\n"
 "All Rights Reserved.\n"
 "Licensed under the Clear BSD license.\n"
 "\n";