hg: jigsaw/jake/langtools: requires jtreg 4.2 b04

[mandy.chung at oracle.com]

Changeset: dd31ba802575
Author:    mchung
Date:      2016-11-28 21:43 -0800
URL:       http://hg.openjdk.java.net/jigsaw/jake/langtools/rev/dd31ba802575

requires jtreg 4.2 b04

! test/TEST.ROOT