RFR(S) 8139164: JVM should throw ClassFormatError for non-void methods named <clinit>

[harold seigel]

Hi,

Please review this small change to fix bug 8139164.

Recent proposed JVM-9 Spec changes (JDK-8130682 
<https://bugs.openjdk.java.net/browse/JDK-8130682>) require throwing 
ClassFormatError exceptions for class file versions >= 51 for methods 
named <clinit> that have one or more arguments or are not static.  This 
fix implements that change.

Open webrev: http://cr.openjdk.java.net/~hseigel/bug_8139164/

JBS Bug: https://bugs.openjdk.java.net/browse/JDK-8139164

The fix was tested with JCK Lang, VM, and API java_lang tests, the UTE 
quick and split verifier tests, and the hotspot, JDK vm, java/io, 
java/lang, and java/util JTreg tests, and the tests included in this RFR.

Thanks, Harold