hg: amber/amber/jdk: updating naming conventions for Constables API

[vicente.romero at oracle.com]

Changeset: 32cb54139494
Author:    briangoetz
Date:      2017-08-21 13:58 -0700
URL:       http://hg.openjdk.java.net/amber/amber/jdk/rev/32cb54139494

updating naming conventions for Constables API
the patch mainly renames XXConstant to XXRef

! src/java.base/share/classes/java/lang/invoke/Constables.java
! test/java/lang/invoke/ConstablesTest.java
! test/java/lang/invoke/IntrinsicsTest.java