hg: amber/amber: Make j.l.invoke.ConstantGroup private

[paul.sandoz at oracle.com]

Changeset: 91e6df6f7571
Author:    psandoz
Date:      2018-03-22 15:37 -0700
URL:       http://hg.openjdk.java.net/amber/amber/rev/91e6df6f7571

Make j.l.invoke.ConstantGroup private

! src/java.base/share/classes/java/lang/invoke/BootstrapCallInfo.java
! src/java.base/share/classes/java/lang/invoke/BootstrapMethodInvoker.java
! src/java.base/share/classes/java/lang/invoke/ConstantGroup.java