[8u40] Request for approval for JDK-8051889: Implement block scoping in symbol assignment and scope computation

[Hannes Wallnoefer]

Hi,

please approve the backport of JDK-8051889 to jdk8u-dev.

Bug: https://bugs.openjdk.java.net/browse/JDK-8051889
Webrev: http://cr.openjdk.java.net/~hannesw/8051889/webrev-8u/
Review thread: 
http://mail.openjdk.java.net/pipermail/nashorn-dev/2014-August/003366.html
JDK9 changeset: http://hg.openjdk.java.net/jdk9/dev/nashorn/rev/2f0161551858

The patch applied cleanly to 8u-dev after fixing path names.

Thanks,
Hannes