hg: jigsaw/jake/langtools: improve javac -X output

[jonathan . gibbons]

Changeset: ed65135d4cd4
Author:    jjg
Date:      2016-03-14 14:42 -0700
URL:       http://hg.openjdk.java.net/jigsaw/jake/langtools/rev/ed65135d4cd4

improve javac -X output

! src/jdk.compiler/share/classes/com/sun/tools/javac/resources/javac.properties