mysql-test/t/disabled.def:
  disabling new test that was added during null-merge from 5.0
  the new test innodb_unsafe_binlog will be re-enabled when the
  5.1 snapshot for InnoDB is applied. Disabling test rather than
  removing files to make future merges easier (removing the files
  would cause merge conflicts when the files are re-added in the
  5.1 snapshot).