compatibility hook, thd_mark_transaction_to_rollback().


mysql-test/r/ps.result:
  Post-merge fix.   Changes for WL 3984 (Revise locking
  of mysql.general_log and mysql.slow_log) cause some test
  result differences.
mysql-test/r/show_check.result:
  Post-merge fix.   Changes for WL 3984 (Revise locking
  of mysql.general_log and mysql.slow_log) cause some test
  result differences.
sql/sql_class.cc:
  Post-merge fix, add InnoDB compatibility hook (defined for
  InnoDB only), thd_mark_transaction_to_rollback().
storage/innobase/handler/ha_innodb.cc:
  Post-merge fix, add InnoDB compatibility hook (defined for
  InnoDB only), thd_mark_transaction_to_rollback().
storage/innobase/handler/ha_innodb.h:
  Post-merge fix, add InnoDB compatibility hook (defined for
  InnoDB only), thd_mark_transaction_to_rollback().