hg: jdk9/sandbox/langtools: Merge

[michael.x.mcmahon at oracle.com]

Changeset: c532695cddd6
Author:    michaelm
Date:      2016-02-15 11:03 +0000
URL:       http://hg.openjdk.java.net/jdk9/sandbox/langtools/rev/c532695cddd6

Merge

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