[8u40] Request for approval: JDK-8059940: Memory leak when executing octane pdfjs with optimistic typing

[Hannes Wallnoefer]

Please approve backport of JDK-8059940 to 8u40.

Bug: https://bugs.openjdk.java.net/browse/JDK-8059940
Webrev: http://cr.openjdk.java.net/~hannesw/8059236/
Review thread: 
http://mail.openjdk.java.net/pipermail/nashorn-dev/2014-October/003604.html
Changeset: http://hg.openjdk.java.net/jdk9/dev/nashorn/rev/ab7cd4002e1e

The patch applies to 8u40 without changes.

Thanks,
Hannes