hg: valhalla/valhalla/hotspot: Class::isValueClass tests if a subclass of __Value to resolve test regression

[mandy.chung at oracle.com]

Changeset: 641b106d1560
Author:    mchung
Date:      2017-06-28 16:38 +0800
URL:       http://hg.openjdk.java.net/valhalla/valhalla/hotspot/rev/641b106d1560

Class::isValueClass tests if a subclass of __Value to resolve test regression

! test/runtime/valhalla/valuetypes/DeriveValueTypeCreation.java
! test/runtime/valhalla/valuetypes/MVTComboTier1.java
! test/runtime/valhalla/valuetypes/ValueOops.java
! test/runtime/valhalla/valuetypes/VboxUnbox.java