Make test independent of icu version

We don't really care about the actual output here, just that it
doesn't fail.

Author: nikic

ext/intl/tests/dateformat_bug65683_2.phpt

@@ -7,6 +7,6 @@ $date_imm = date_create_immutable('1970-01-01');
 var_dump(datefmt_format_object($date, null, 'fr_FR'));
 var_dump(datefmt_format_object($date_imm, null, 'fr_FR'));
 ?>
---EXPECT--
-string(24) "1 janv. 1970 à 00:00:00"
-string(24) "1 janv. 1970 à 00:00:00"
+--EXPECTF--
+string(%d) "%s"
+string(%d) "%s"