hg: jdk8/tl/langtools: 8007305: DPrinter: provide better usage message

[jonathan . gibbons]

Changeset: 6df931ce1a81
Author:    jjg
Date:      2013-02-01 08:36 -0800
URL:       http://hg.openjdk.java.net/jdk8/tl/langtools/rev/6df931ce1a81

8007305: DPrinter: provide better usage message
Reviewed-by: mcimadamore

! test/tools/javac/lib/DPrinter.java