hg: jdk9/sandbox/langtools: Merge

[aleksey.shipilev at oracle.com]

Changeset: 9c7763d3b048
Author:    shade
Date:      2016-04-28 17:41 +0300
URL:       http://hg.openjdk.java.net/jdk9/sandbox/langtools/rev/9c7763d3b048

Merge

! src/jdk.compiler/share/classes/com/sun/tools/javac/code/Symtab.java
! src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Infer.java
- test/tools/javac/SerialWarn.java
- test/tools/javac/SerialWarn.out
- test/tools/javac/positions/T6253161.java
- test/tools/javac/positions/T6253161.out
- test/tools/javac/positions/T6253161a.java
- test/tools/javac/positions/T6253161a.out
- test/tools/jdeps/jdk.unsupported/Foo.java
- test/tools/jdeps/jdk.unsupported/JDKUnsupportedTest.java