[8u40] approval request for 8056094: [nashorn] tests fail when running via jtreg

[A. Sundararajan]

Please approve.

Bug: https://bugs.openjdk.java.net/browse/JDK-8056094
jdk9 review thread: 
http://mail.openjdk.java.net/pipermail/nashorn-dev/2014-August/003342.html
jdk8u40 webrev: http://cr.openjdk.java.net/~sundar/8056094/8u40/

jdk9 changeset is imported "as is" without any 8u40 specific changes.

Thanks,
-Sundar