RFR: 8176511: JSObject property access is broken for numeric keys outside the int range

[Hannes Wallnöfer]

Please review 8176511: JSObject property access is broken for numeric keys 
outside the int range

Bug: https://bugs.openjdk.java.net/browse/JDK-8176511
Webrev: http://cr.openjdk.java.net/~hannesw/8176511/webrev/

Thanks,
Hannes