hg: jigsaw/jigsaw/langtools: cleanup and doc langtools build.xml file

[jonathan.gibbons at oracle.com]

Changeset: 2c30424a8283
Author:    jjg
Date:      2010-06-04 17:46 -0700
URL:       http://hg.openjdk.java.net/jigsaw/jigsaw/langtools/rev/2c30424a8283

cleanup and doc langtools build.xml file

! make/build.properties
! make/build.xml