After fix of bug46322, logging to table is turned off, each test
that need this should turn on it in it's opt file.

Add suppression to unsafe statement warnings for binlog_unsafe.test.

mysql-test/suite/binlog/t/binlog_unsafe-master.opt:
  After fix of bug46322, logging to table is turned off, each test that need this should turn on it in it's opt file.
mysql-test/suite/binlog/t/binlog_unsafe.test:
  suppress Unsafe statement warnings