hg: jdk9/sandbox/langtools: Merge

[erik.joelsson at oracle.com]

Changeset: 76ab92ac5e97
Author:    erikj
Date:      2016-02-11 12:13 +0100
URL:       http://hg.openjdk.java.net/jdk9/sandbox/langtools/rev/76ab92ac5e97

Merge

- test/tools/javac/T6873845.java
- test/tools/javac/warnings/6594914/T6594914b.java