RFR: JDK-8132148 : G1 hs_err region dump legend out of sync with region values

[Eric Caspole]

Hi everybody,
The other day we noticed the legend for the G1 regions in the hs_err 
file was out of sync with the actual values, here is a patch:

  http://cr.openjdk.java.net/~ecaspole/JDK-8132148/webrev/

For bug:
  https://bugs.openjdk.java.net/browse/JDK-8132148

Let me know what you think.
Thanks,
Eric