package/harfbuzz: bump to version 2.8.2

package/harfbuzz: bump to version 2.8.2

The hash of the COPYING file is updated due to the following changes:

 Copyright © 2010,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020  Google, Inc.
 Copyright © 2018,2019,2020  Ebrahim Byagowi
-Copyright © 2019,2020  Facebook, Inc.
+Copyright © 2019,2020  Facebook, Inc.
 Copyright © 2012  Mozilla Foundation
 Copyright © 2011  Codethink Limited
 Copyright © 2008,2010  Nokia Corporation and/or its subsidiary(-ies)
 Copyright © 2009  Keith Stribley
 Copyright © 2009  Martin Hosken and SIL International
 Copyright © 2007  Chris Wilson
-Copyright © 2006  Behdad Esfahbod
+Copyright © 2005,2006,2020,2021  Behdad Esfahbod
 Copyright © 2005  David Turner
 Copyright © 2004,2007,2008,2009,2010  Red Hat, Inc.
 Copyright © 1998-2004  David Turner and Werner Lemberg

Signed-off-by: Francois Perrad <francois.perrad@gadz.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>