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

[maurizio.cimadamore at oracle.com]

Changeset: 211bd81860eb
Author:    langtools at sthdev02.uk.oracle.com
Date:      2017-09-08 00:00 +0200
URL:       http://hg.openjdk.java.net/amber/amber/langtools/rev/211bd81860eb

Automatic merge with default