[HB] Update text files

src/COPYING

-HarfBuzz was previously licensed under different licenses.  This was
-changed in January 2008.  If you need to relicense your old copies,
-consult the announcement of the license change on the internet.
-Other than that, each copy of HarfBuzz is licensed under the COPYING
-file included with it.  The actual license follows:
-
-
 Permission is hereby granted, without written agreement and without
 license or royalty fees, to use, copy, modify, and distribute this
 software and its documentation for any purpose, provided that the

src/README

 This is HarfBuzz, an OpenType Layout engine.
 
-It was derived originally from the OpenType code in FreeType-1.x, ported to
-FreeType2.  (This code has been abandoned for FreeType2, but until something
-better comes along, should serve our purposes.) In addition to porting to
-FreeType-2, it has been modified in various other ways.
-
-It also includes a partial XML dumper for OpenType Layout tables useful for
-figuring out what is going on. Please extend to cover additional parts of the
-tables as you encounter fonts using them.  The dumper is written by Owen Taylor.
-
 Bug reports on these files should be sent to the HarfBuzz mailing list as
 listed on http://freedesktop.org/wiki/Software/harfbuzz
 
-For license information, see the file COPYING. 
+For license information, see the file COPYING.
 
 Behdad Esfahbod
-April 1st, 2006
+May 24, 2009