mysql-test/lib/My/SafeProcess.pm:
  Ifnore Ctrl-C in timer process
  Don't wait blocking for a preoces where start_kill fails
  Rewrite sart_kill to return 0 for error and > 1 for sucess
mysql-test/lib/My/SafeProcess/safe_process_win.cc:
  Add missing fflush(stderr) in 'die'