CRR (XS / 1 line changed!): 7087717: G1: make the G1PrintRegionLivenessInfo parameter diagnostic

[Tony Printezis]

Hi all,

I'd like a couple of code review for this very simple change (only one 
line changed!):

http://cr.openjdk.java.net/~tonyp/7087717/webrev.0/

Thanks,

Tony