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

[maurizio.cimadamore at oracle.com]

Changeset: 7a52feb9587f
Author:    langtools at sthdev02.uk.oracle.com
Date:      2017-05-26 00:01 +0200
URL:       http://hg.openjdk.java.net/amber/amber/langtools/rev/7a52feb9587f

Automatic merge with default