[8u20] Request for approval for JDK-8041953

[Hannes Wallnoefer]

Please approve JDK-8041953 for 8u20.

This fixes a merge error in jdk8u/jdk8u-dev/nashorn and restores the 
content of JavaAdapterBytecodeGenerator.java to what it should be based 
on the merged changesets.

Bug: https://bugs.openjdk.java.net/browse/JDK-8041953
Webrev: http://cr.openjdk.java.net/~hannesw/8041953/
Review request: 
http://mail.openjdk.java.net/pipermail/nashorn-dev/2014-April/002924.html

Thanks,
Hannes