Review Request JDK-8173975: Lookup::in should not allow target class be primitive or array class

[Mandy Chung]

MethodHandles::lookup produces a Lookup object on the caller class. The 
original intention for a Lookup object whose lookup class is always a 
non-array and non-primitive class.

MethodHandles::privateLookupIn and Lookup::in are the two other ways 
that can produce a new Lookup object and they should disallow the new 
lookup class be a primitive or array class.

This patch proposes to make Lookup::in consistent with 
MethodHandles::privateLookupIn to throw IAE if the target class is an 
array type or primitive type.


CSR: https://bugs.openjdk.java.net/browse/JDK-8232227
webrev:
http://cr.openjdk.java.net/~mchung/jdk14/8173975/webrev.00/

thanks
Mandy