RFR: 8189266: (ann) Optimize AnnotationInvocationHandler.invoke

[Claes Redestad]

Hi,

please review this patch, contributed by Christoph Dreis, to speed up 
AnnotationInvocationHandler.invoke, primarily by avoiding cloning the 
Method parameterTypes array unnecessarily.

Webrev: http://cr.openjdk.java.net/~redestad/8189266/jdk.00/

Bug: https://bugs.openjdk.java.net/browse/JDK-8189266

Thanks!

/Claes