RFR 8180274: Fix links in nashorn documentation

[Jim Laskey (Oracle)]

+1

> On Sep 29, 2017, at 1:56 AM, Sundararajan Athijegannathan <sundararajan.athijegannathan at oracle.com> wrote:
> 
> Please review.
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8180274
> Webrev: http://cr.openjdk.java.net/~sundar/8180274/webrev.00/
> 
> Thanks,
> -Sundar