hg: amber/amber/langtools: Automatic merge with default

[john.r.rose at oracle.com]

Changeset: 42080ab1ca8e
Author:    jrose
Date:      2017-09-03 23:44 -0700
URL:       http://hg.openjdk.java.net/amber/amber/langtools/rev/42080ab1ca8e

Automatic merge with default