RFR: 8163945: Honor Number type hint in toPrimitive on Numbers

[Hannes Wallnöfer]

Please review 8163945: Honor Number type hint in toPrimitive on Numbers:

Bug: https://bugs.openjdk.java.net/browse/JDK-8163945
Webrev: http://cr.openjdk.java.net/~hannesw/8163945/

Thanks,
Hannes