grab newer versions of gnu config scripts

autogen.sh

@@ -5,3 +5,6 @@ set -e
 mkdir -p m4
 rm -fr autom4te.cache
 autoreconf -i
+chmod -R u+w .
+curl 'http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.guess;hb=HEAD' > config.guess
+curl 'http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub;hb=HEAD' > config.sub