Review request for JDK-8156896: Script stack trace should display function names

[Hannes Wallnoefer]

Review request for JDK-8156896: Script stack trace should display 
function names

http://cr.openjdk.java.net/~hannesw/8156896/webrev/
This makes it possible to reliably get the original function name from 
Java method names for display in script stack traces. It replaces '$' 
with '#' as separator for nested function method names as '#' is not a 
valid JS identifier part, but allowed in JVM method names.

Hannes