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

[vicente.romero at oracle.com]

Changeset: 63c69ded8b60
Author:    vromero
Date:      2018-08-22 11:43 -0700
URL:       http://hg.openjdk.java.net/amber/amber/rev/63c69ded8b60

manual merge with jep-334

! src/java.base/share/classes/java/lang/Enum.java
! src/java.base/share/classes/java/lang/constant/ConstantDescs.java
! src/java.base/share/classes/java/lang/constant/ConstantUtils.java
! src/java.base/share/classes/java/lang/constant/DynamicConstantDesc.java
! src/java.base/share/classes/java/lang/constant/MethodTypeDescImpl.java
! src/java.base/share/classes/java/lang/constant/PrimitiveClassDescImpl.java
! src/java.base/share/classes/java/lang/constant/ReferenceClassDescImpl.java
! test/jdk/java/lang/constant/CondyRefTest.java
! test/jdk/java/lang/constant/MethodHandleRefTest.java