RFR: 8035746: Add missing Klass::oop_is_instanceClassLoader() function

[Stefan Karlsson]

Hi all,

Please, review this small patch to add Klass::oop_is_instanceClassLoader().

Webrev:
http://cr.openjdk.java.net/~stefank/8035746/webrev.00

RFE:
https://bugs.openjdk.java.net/browse/JDK-8035746

thanks,
StefanK