Added licence boilerplate to our MATLAB files.

webrtc/modules/audio_processing/test/apmtest.m

+%
+%  Copyright (c) 2011 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 apmtest(task, testname, filepath, casenumber, legacy)
 %APMTEST is a tool to process APM file sets and easily display the output.
 %   APMTEST(TASK, TESTNAME, CASENUMBER) performs one of several TASKs:
 %     'test'  Processes the files to produce test output.
 %     'list'  Prints a list of cases in the test set, preceded by their
 %             CASENUMBERs.
 %     'show'  Uses spclab to show the test case specified by the
 %             CASENUMBER parameter.
 %
 %   using a set of test files determined by TESTNAME:
@@ skipping 335 matching lines @@
   are_equal = true;
 else
   if isempty(new)
     warning([newfile ' is empty']);
     return
   end
   snr = snrseg(new,ref,80);
   fprintf('\n');
   are_equal = false;
 end