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

[maurizio.cimadamore at oracle.com]

Changeset: f4c9047eab92
Author:    langtools
Date:      2017-05-13 00:15 +0200
URL:       http://hg.openjdk.java.net/amber/amber/langtools/rev/f4c9047eab92

Automatic merge with default