hg: jdk/jdk: 8235513: Change JVM to check for preview features using JVM_CLASSFILE_MAJOR_VERSION

[harold.seigel at oracle.com]

Changeset: 819be120e63d
Author:    hseigel
Date:      2019-12-10 15:00 +0000
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/819be120e63d

8235513: Change JVM to check for preview features using JVM_CLASSFILE_MAJOR_VERSION
Summary: Check for JVM_CLASSFILE_MAJOR_VERSION instead of a hard-wired version number
Reviewed-by: dholmes, coleenp

! src/hotspot/share/classfile/classFileParser.cpp