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

[maurizio.cimadamore at oracle.com]

Changeset: 54a0fa29afaf
Author:    langtools at sthdev02.uk.oracle.com
Date:      2017-09-01 00:01 +0200
URL:       http://hg.openjdk.java.net/amber/amber/langtools/rev/54a0fa29afaf

Automatic merge with default

! .hgtags