CSR: https://bugs.openjdk.java.net/browse/JDK-8250224
Webrev: http://cr.openjdk.java.net/~mchung/jdk16/webrevs/8250219/webrev.00/
This patch updates the `|Proxy::newProxyInstance` |spec to explicitly
list that the given interfaces must be non-hidden interfaces.|
Proxy::newProxyInstance| currently throws IAE if a given proxy interface
cannot be found by the given class loader. This covers for the case of a
hidden proxy interface since it is not discoverable by any class loader.
However the spec should clearly document the behavior about hidden
interfaces and the exception message indicates if the interface is
hidden clearly.
thanks
Mandy
