RFR 8047359: large string size RangeError should be thrown rather than reporting negative length

[Hannes Wallnoefer]

Looks good.

Hannes

Am 2014-07-01 13:00, schrieb A. Sundararajan:
> Please review http://cr.openjdk.java.net/~sundar/8047359/
>
> PS. Also contains minor clean-ups to compile nashorn with -Xlint:all 
> option.
>
> Thanks
> -Sundar