[8u-dev] Request for Approval: 8144020: Remove long as an internal numeric type

[Hannes Wallnoefer]

Please approve backport of 8144020 to 8u-dev.

Bug: https://bugs.openjdk.java.net/browse/JDK-8144020
8u webrev: http://cr.openjdk.java.net/~hannesw/8144020/webrev-8u/
9 webrev: Webrev: http://cr.openjdk.java.net/~hannesw/8144020/webrev.01/
Review thread: 
http://mail.openjdk.java.net/pipermail/nashorn-dev/2016-January/005876.html

Some manual merging was necessary as explained in the review thread.

Thanks,
Hannes