RFR (XS) CR 8058643: (str) Re-examine hashCode implementation

[Aleksey Shipilev]

Hi,

Can I have a review and a sponsorship for this tiny readability cleanup
in String.hashCode()?
 http://cr.openjdk.java.net/~shade/8058643/webrev.01/
 https://bugs.openjdk.java.net/browse/JDK-8058643

Thanks,
-Aleksey.