hg: jdk8/tl/langtools: 8023520: Add missing test for JDK-7118412

[eric . mccorkle]

Changeset: eebb29618f50
Author:    emc
Date:      2013-08-21 20:41 -0400
URL:       http://hg.openjdk.java.net/jdk8/tl/langtools/rev/eebb29618f50

8023520: Add missing test for JDK-7118412
Summary: The test for JDK-7118412 was dropped from the changeset in a merging 
accident.
Reviewed-by: jjg

+ test/tools/javac/7118412/ShadowingTest.java