Update years in copyright notice for the GDB files.

Two modifications:
  1. The addition of 2013 to the copyright year range for every file;
  2. The use of a single year range, instead of potentially multiple
     year ranges, as approved by the FSF.

gdb/contrib/ari/create-web-ari-in-src.sh

@@ -2,7 +2,7 @@
 
 # GDB script to create web ARI page directly from within gdb/ari directory.
 #
-# Copyright (C) 2012 Free Software Foundation, Inc.
+# Copyright (C) 2012-2013 Free Software Foundation, Inc.
 #
 # This file is part of GDB.
 #

gdb/contrib/ari/gdb_ari.sh

@@ -2,7 +2,7 @@
 
 # GDB script to list of problems using awk.
 #
-# Copyright (C) 2002-2012 Free Software Foundation, Inc.
+# Copyright (C) 2002-2013 Free Software Foundation, Inc.
 #
 # This file is part of GDB.
 #

gdb/contrib/ari/gdb_find.sh

@@ -2,7 +2,7 @@
 
 # GDB script to create list of files to check using gdb_ari.sh.
 #
-# Copyright (C) 2003-2012 Free Software Foundation, Inc.
+# Copyright (C) 2003-2013 Free Software Foundation, Inc.
 #
 # This file is part of GDB.
 #

gdb/contrib/ari/update-web-ari.sh

@@ -2,7 +2,7 @@
 
 # GDB script to create GDB ARI web page.
 #
-# Copyright (C) 2001-2012 Free Software Foundation, Inc.
+# Copyright (C) 2001-2013 Free Software Foundation, Inc.
 #
 # This file is part of GDB.
 #

gdb/contrib/cc-with-tweaks.sh

@@ -2,7 +2,7 @@
 # Wrapper around gcc to tweak the output in various ways when running
 # the testsuite.
 
-# Copyright (C) 2010-2012 Free Software Foundation, Inc.
+# Copyright (C) 2010-2013 Free Software Foundation, Inc.
 # 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 3 of the License, or

gdb/contrib/test_pubnames_and_indexes.py

@@ -1,6 +1,6 @@
 #! /usr/bin/env python
 
-# Copyright (C) 2011-2012 Free Software Foundation, Inc.
+# Copyright (C) 2011-2013 Free Software Foundation, Inc.
 #
 # This file is part of GDB.
 #