Use new FSF address in license header

The issue was uncovered by lintian while checking .deb packaging.

Change-Id: Idfe0e3d61f2604521647e9ef5ffb984db96aabbe
diff --git a/debian/copyright b/debian/copyright
index 97b890e..2ae974f 100644
--- a/debian/copyright
+++ b/debian/copyright
@@ -185,7 +185,7 @@
  .
  You should have received a copy of the GNU Lesser General Public
  License along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  .
  The FSF address in the above text is the old one.
  .
@@ -268,7 +268,7 @@
  .
  You should have received a copy of the GNU Lesser General Public
  License along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  .
  THIS IS A WORK IN PROGRESS. IT IS NOT FINISHED.
  Currently it performs the core compression and decompression functions OK.