Add missing include test file for rpl_server_id test

mysql-test/include/show_binlog_events2.inc:
  New BitKeeper file ``mysql-test/include/show_binlog_events2.inc''

mysql-test/include/show_binlog_events2.inc

+--let $binlog_start=98
+--replace_result $binlog_start <binlog_start>
+--replace_column 2 # 5 #
+--replace_regex /\/\* xid=.* \*\//\/* XID *\// /table_id: [0-9]+/table_id: #/
+--eval show binlog events from $binlog_start