hg: amber/amber: manual merge jep-334 branch

[vicente.romero at oracle.com]

Changeset: 7f2baec494c9
Author:    vromero
Date:      2018-06-08 12:38 -0700
URL:       http://hg.openjdk.java.net/amber/amber/rev/7f2baec494c9

manual merge jep-334 branch

! src/java.base/share/classes/java/lang/Class.java
! src/java.base/share/classes/java/lang/constant/Constable.java
! src/java.base/share/classes/java/lang/constant/ConstantClassDesc.java
! src/java.base/share/classes/java/lang/constant/ConstantMethodHandleDesc.java
! src/java.base/share/classes/java/lang/constant/MethodHandleDesc.java
! src/java.base/share/classes/java/lang/invoke/MethodHandle.java
! src/java.base/share/classes/java/lang/invoke/VarHandle.java
! test/jdk/java/lang/constant/MethodHandleRefTest.java