[8u-dev] Request for Approval: 8138632: Sparse array does not handle growth of underlying dense array

[Hannes Wallnoefer]

Please approve backport of 8138632 to 8u-dev.

Bug: https://bugs.openjdk.java.net/browse/JDK-8138632
Webrev: http://cr.openjdk.java.net/~hannesw/8138632/webrev/
Review thread: 
http://mail.openjdk.java.net/pipermail/nashorn-dev/2015-September/005353.html

Changes apply cleanly to jdk8u-dev after path reshuffling.

Thanks,
Hannes