hg: jdk7/tl/langtools: 6942649: add hidden option to identify location and version of javac classes

[jonathan.gibbons at sun.com]

Changeset: 96072ad00783
Author:    jjg
Date:      2010-04-09 15:39 -0700
URL:       http://hg.openjdk.java.net/jdk7/tl/langtools/rev/96072ad00783

6942649: add hidden option to identify location and version of javac classes
Reviewed-by: darcy

! src/share/classes/com/sun/tools/javac/main/Main.java
+ test/tools/javac/T6942649.java