8u40] Request for approval: JDK-8057980: let & const: remaining issues with lexical scoping

[Hannes Wallnoefer]

Please approve backport of JDK-8057980 to 8u40.

Bug: https://bugs.openjdk.java.net/browse/JDK-8057980
Webrev JDK9: http://cr.openjdk.java.net/~hannesw/8057980/webrev-9.02/
Webrev JDK8u: http://cr.openjdk.java.net/~hannesw/8057980/webrev-8u/
Review thread: 
http://mail.openjdk.java.net/pipermail/nashorn-dev/2014-November/003909.html
Changeset: http://hg.openjdk.java.net/jdk9/dev/nashorn/rev/e26843ca558b

The patch applies cleanly to 8u40 after fixing path names except for 
some of the changes to jdk/nashorn/internal/parser/Parser.java. The 
manually backported changes have been reviewed and tested.

Thanks,
Hannes