[8u-dev] Request for Approval: 8156896: Script stack trace should display function names

[Hannes Wallnoefer]

Please approve backport of 8156896 to 8u-dev.

Bug: https://bugs.openjdk.java.net/browse/JDK-8156896
Webrev: http://cr.openjdk.java.net/~hannesw/8156896/webrev/
Review thread: 
http://mail.openjdk.java.net/pipermail/nashorn-dev/2016-May/006158.html

Changes apply cleanly to jdk8u-dev after path reshuffling.

Thanks,
Hannes