Review Request: JDK-8185450: [MVT] ArrayLengthTest.java fails with NullPointerException

[mandy chung]

A simple patch. MethodHandles::arrayXXX methods should detect if the 
specified class is not an array type and throw IAE.  I piggyback in this 
patch a small optimization in Class::isValueClass to return false if 
value type is not enabled.

http://cr.openjdk.java.net/~mchung/valhalla/webrevs/8185450/webrev.00/index.html

Mandy