RFR (XS): 8157188: 2 test failures in demo/jvmti due to unexpected class file version 53

[David Holmes]

Not sure who really owns this file so cc'ing core-libs and serviceability.

bug: https://bugs.openjdk.java.net/browse/JDK-8157188

The file src/java.base/share/native/include/classfile_constants.h 
describes information about classfiles and is used by libverify and 
./demo/share/jvmti/java_crw_demo/java_crw_demo.c

This file has not been updated for classfile version 53 and so asserts 
will fail in java_crw_demo.c when it encounters classes compiled for 
version 53 - as they now are. This version change caused test failures 
in the hotspot forest when it was pulled down earlier this week.

This fix trivially bumps the current version number to 53 to fix the 
failing tests. It is a separate issue as to whether other changes are 
needed in this file to reflect what is new with classfile version 53.

Diff below.

Thanks,
David
------

diff -r 3eea6819cc1f 
src/java.base/share/native/include/classfile_constants.h
--- a/src/java.base/share/native/include/classfile_constants.h
+++ b/src/java.base/share/native/include/classfile_constants.h
@@ -1,5 +1,5 @@
  /*
- * Copyright (c) 2004, 2012, Oracle and/or its affiliates. All rights 
reserved.
+ * Copyright (c) 2004, 2016, Oracle and/or its affiliates. All rights 
reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
@@ -31,7 +31,7 @@
  #endif

  /* Classfile version number for this information */
-#define JVM_CLASSFILE_MAJOR_VERSION 52
+#define JVM_CLASSFILE_MAJOR_VERSION 53
  #define JVM_CLASSFILE_MINOR_VERSION 0

  /* Flags */