LICENSES: Replace the obsolete address of the FSF in the GFDL-1.2

The FSF does not reside in the Franklin street anymore. Let's update
the address with the link to their website, as suggested in the latest
revisions of their GFDL-1.2 license:
https://www.gnu.org/licenses/old-licenses/fdl-1.2.txt

Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: huth

LICENSES/deprecated/GFDL-1.2

@@ -23,7 +23,7 @@ License-Text:
 
 
  Copyright (C) 2000,2001,2002  Free Software Foundation, Inc.
-     51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+     <https://fsf.org/>
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.