Review: JDK 8 CR for Support Integer overflow updated

[Roger Riggs]

I don't anticipate making any more changes though a few of the
comments deserve followup as a separate CR.

Is there an OpenJDK committer who would commit?

Thanks, Roger

> Updated the webrev for CR6708398:
>          http://cr.openjdk.java.net/~rriggs/6708398.2
>