Licensing changes to GPLv3 resp. GPLv3 with GCC Runtime Exception.

From-SVN: r145841
diff --git a/libcpp/include/cpplib.h b/libcpp/include/cpplib.h
index 469aaed..434308b 100644
--- a/libcpp/include/cpplib.h
+++ b/libcpp/include/cpplib.h
@@ -6,7 +6,7 @@
 
 This program is free software; you can redistribute it and/or modify it
 under the terms of the GNU General Public License as published by the
-Free Software Foundation; either version 2, or (at your option) any
+Free Software Foundation; either version 3, or (at your option) any
 later version.
 
 This program is distributed in the hope that it will be useful,
@@ -15,8 +15,8 @@
 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+along with this program; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.
 
  In other words, you are welcome to use, share and improve this program.
  You are forbidden to forbid anyone else to use, share and improve