[8u-dev] Request for Approval: 8134569: Add tests for prototype callsites

[Hannes Wallnoefer]

Please approve backport of 8134569 to 8u-dev.

Bug: https://bugs.openjdk.java.net/browse/JDK-8134569
Webrev: http://cr.openjdk.java.net/~hannesw/8134569/webrev/
Review thread: 
http://mail.openjdk.java.net/pipermail/nashorn-dev/2015-September/005189.html

This only adds a test script, changes apply cleanly to jdk8u-dev without 
change.

Thanks,
Hannes