RFR: 8000489: older builds of hsdis don't work anymore after 6879063

[yumin . qi]

 Hi, all

  Can I have your codereview of 8000489: older builds of hsdis don't 
work anymore after 6879063
  It caused old build broke the disassembler.
  Webrev: http://cr.openjdk.java.net/~minqi/8000489

Thanks
Yumin