[8u40] Request for approval: JDK-8064789: Nashorn should just warn on code store instantiation error

[Hannes Wallnoefer]

Please approve backport of JDK-8064789 to 8u40.

The patch applies cleanly to 8u40 after fixing path names.

Bug: https://bugs.openjdk.java.net/browse/JDK-8064789
Webrev: http://cr.openjdk.java.net/~hannesw/8064789/
Review thread: 
http://mail.openjdk.java.net/pipermail/nashorn-dev/2014-November/003853.html
Changeset: http://hg.openjdk.java.net/jdk9/dev/nashorn/rev/ac3ab0a5be8e

Thanks,
Hannes