Blind attempt to fix BUG 12881278 - MAIN.MYISAM TEST FAILS ON LINUX
  
  The printed text is truncated on char 63:
  
    "MySQL thread id 1236, OS thread handle 0x7ff187b96700, query id"
  
  still I do not understand how this truncation could have caused the
  main.myisam failure but anyway - the buffer needs to be increased.