Added licence boilerplate to our MATLAB files.

webrtc/modules/audio_processing/transient/test/readPCM.m

Index: webrtc/modules/audio_processing/transient/test/readPCM.m
diff --git a/webrtc/modules/audio_processing/transient/test/readPCM.m b/webrtc/modules/audio_processing/transient/test/readPCM.m
index 47ccac33e71e42d015ccc16576c229b9ba5e124c..cd3cef8a3cc1b20e150d264cfb65651a6798bd7b 100644
--- a/webrtc/modules/audio_processing/transient/test/readPCM.m
+++ b/webrtc/modules/audio_processing/transient/test/readPCM.m
@@ -1,3 +1,13 @@
+%
+%  Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
+%
+%  Use of this source code is governed by a BSD-style license
+%  that can be found in the LICENSE file in the root of the source
+%  tree. An additional intellectual property rights grant can be found
+%  in the file PATENTS.  All contributing project authors may
+%  be found in the AUTHORS file in the root of the source tree.
+%
+
 function [x, t] = readPCM(file, fs)
 %[x, t] = readPCM(file, fs)
 %