debian/copyright: update file locations for codecs to be under 3rdparty/ directory

debian/copyright

@@ -5,10 +5,10 @@ Files-Excluded:
   3rdparty/celt-0.11.0-src/doc/*
   3rdparty/celt-0.7.0-src/doc/*
   3rdparty/opus-src/doc/*
-  celt-0.7.0-src/doc/*
-  celt-0.11.0-src/doc/*
-  opus-src/doc/*
-  speex/doc/*
+  3rdparty/celt-0.7.0-src/doc/*
+  3rdparty/celt-0.11.0-src/doc/*
+  3rdparty/opus-src/doc/*
+  3rdparty/speex-src/doc/*
 Comment: Originally debianized by Patrick Matthäi <pmatthaei@debian.org>
          Sun, 16 Mar 2008 11:09:08 +0100.
 
@@ -34,7 +34,7 @@ Copyright: 2007-2009 Thorvald Natvig <slicer@users.sourceforge.net>
            2012-2019 Christopher Knadle <Chris.Knadle@coredump.us>
 License: BSD-3-clause
 
-Files: speex/*
+Files: 3rdparty/speex-src/*
 Copyright: 2002-2008 Xiph.org Foundation
            2002-2008 Jean-Marc Valin
            2005-2007 Analog Devices Inc.
@@ -48,7 +48,7 @@ Copyright: 2002-2008 Xiph.org Foundation
            1993, 2002, 2006 David Rowe
 License: BSD-3-clause
 
-Files: celt-0.7.0-src/*
+Files: 3rdparty/celt-0.7.0-src/*
 Copyright: 2001-2009 Jean-Marc Valin, Timothy B. Terriberry,
                      CSIRO, and other contributors
 License: BSD-3-clause
@@ -57,21 +57,21 @@ Comment: CELT contains KISS FFT:
                     2008      Gregory Maxwell
          License: BSD-3-clause
 
-Files: celt-0.7.0-src/libcelt/celt_types.h
+Files: 3rdparty/celt-0.7.0-src/libcelt/celt_types.h
 Copyright: 1994-2002 Xiph.Org Foundation http://www.xiph.org/
 License: BSD-3-clause
 Comment: this file copied from the Ogg Vorbis project
 
-Files: celt-0.7.0-src/libcelt/float_cast.h
+Files: 3rdparty/celt-0.7.0-src/libcelt/float_cast.h
 Copyright: 2001 Erik de Castro Lopo <erikd AT mega-nerd DOT com>
 License: ISC
 
-Files: celt-0.11.0-src/*
+Files: 3rdparty/celt-0.11.0-src/*
 Copyright: 2001-2009 Jean-Marc Valin, Timothy B. Terriberry,
                      CSIRO, and other contributors
 License: BSD-2-clause
 
-Files: opus-src/*
+Files: 3rdparty/opus-src/*
 Copyright: 2001-2011 Xiph.Org, Skype Limited, Octasic,
                     Jean-Marc Valin, Timothy B. Terriberry,
                     CSIRO, Gregory Maxwell, Mark Borgerding,