hg: amber/amber/langtools: Create branch for constant dynamic

[maurizio.cimadamore at oracle.com]

Changeset: d2f2f53cdeb2
Author:    mcimadamore
Date:      2017-05-04 12:00 +0100
URL:       http://hg.openjdk.java.net/amber/amber/langtools/rev/d2f2f53cdeb2

Create branch for constant dynamic