Fall back to autogen259 if autogen isn't available

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%401567

autogen.sh

@@ -5,7 +5,9 @@ echo "This may take a while ..."
 
 # Regenerate configuration files
 cp acinclude.m4 aclocal.m4
-autoconf
+for autoconf in autoconf autoconf259
+do if which $autoconf >/dev/null; then $autoconf; break; fi
+done
 (cd test; sh autogen.sh)
 
 # Run configure for this platform

test/autogen.sh

@@ -2,4 +2,6 @@
 #
 # Regenerate configuration files
 cp acinclude.m4 aclocal.m4
-autoconf
+for autoconf in autoconf autoconf259
+do if which $autoconf >/dev/null; then $autoconf; break; fi
+done