[8u60] Request for Approval: 8066773: JSON-friendly wrapper for objects

[Attila Szegedi]

Please approve.

Bug: https://bugs.openjdk.java.net/browse/JDK-8066773
jdk9 webrev: http://cr.openjdk.java.net/~attila/8066773/webrev.00
jdk9 review thread: http://mail.openjdk.java.net/pipermail/nashorn-dev/2015-May/004625.html
Approved CCC request: http://ccc.us.oracle.com/8066773 

Changes apply cleanly to jdk8u-dev after path reshuffling from modular source code layout. CCC request was filed and approved because of addition of a new method to the ScriptObjectMirror exported API.

Thanks,
  Attila.