mysql57 test: skip zero date case

mysql-test/mroonga/storage/column/date/t/zero_date.test

@@ -1,4 +1,5 @@
 # Copyright(C) 2013 Kentoku SHIBA
+# Copyright(C) 2016 Kouhei Sutou <kou@clear-code.com>
 #
 # This library is free software; you can redistribute it and/or
 # modify it under the terms of the GNU Lesser General Public
@@ -15,6 +16,7 @@
 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
 --source ../../../../include/mroonga/have_mroonga.inc
+--source ../../../../include/mroonga/skip_mysql_57_or_later.inc
 
 --disable_warnings
 DROP TABLE IF EXISTS timestamps;