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

[yumin.qi at oracle.com]

  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