tests: fix for newer Sun Studio C++.

Reported by Dagobert Michelsen at
<http://lists.gnu.org/archive/html/bug-bison/2010-03/msg00023.html>.
* THANKS (Dagobert Michelsen): Add.
* configure.ac (AC_PREREQ): Set to 2.64 so we get the latest
Autoconf macro for handling the restrict keyword.
* gnulib: Update to latest, which no longer overrides that macro
from Autoconf.
(cherry picked from commit 4333ba11c6)

ChangeLog

@@ -1,3 +1,14 @@
+2010-04-10  Joel E. Denny  <joeldenny@joeldenny.org>
+
+	tests: fix for newer Sun Studio C++.
+	Reported by Dagobert Michelsen at
+	<http://lists.gnu.org/archive/html/bug-bison/2010-03/msg00023.html>.
+	* THANKS (Dagobert Michelsen): Add.
+	* configure.ac (AC_PREREQ): Set to 2.64 so we get the latest
+	Autoconf macro for handling the restrict keyword.
+	* gnulib: Update to latest, which no longer overrides that macro
+	from Autoconf.
+
 2010-04-03  Joel E. Denny  <jdenny@ces.clemson.edu>
 
 	portability: fix pointer arithmetic to conform to C standard.

THANKS

@@ -24,6 +24,7 @@ Christian Burger          cburger@sunysb.edu
 Cris Bailiff              c.bailiff+bison@awayweb.com
 Cris van Pelt             cris@amf03054.office.wxs.nl
 Csaba Raduly              csaba_22@yahoo.co.uk
+Dagobert Michelsen        dam@baltic-online.de
 Daniel Hagerty            hag@gnu.org
 David J. MacKenzie        djm@gnu.org
 Derek M. Jones            derek@knosof.co.uk

configure.ac

@@ -15,8 +15,10 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-# We have strange test case titles, so we need Autoconf 2.61 or better.
-AC_PREREQ(2.61)
+# In order for some versions of Sun Studio to compile our C++ test cases
+# correctly, we need Autoconf 2.64 or better to handle the restrict
+# keyword in at least string.h from gnulib.
+AC_PREREQ(2.64)
 
 AC_INIT([GNU Bison],
         m4_esyscmd([build-aux/git-version-gen .tarball-version]),