Update to a hopefully more future proof FSF address

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
diff --git a/bt-vhci.c b/bt-vhci.c
index ee90f10..679c5e0 100644
--- a/bt-vhci.c
+++ b/bt-vhci.c
@@ -14,8 +14,7 @@
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
  */
 
 #include "qemu-common.h"