hg: jigsaw/jake/langtools: Configure jtreg to use new form of -Xpatch

[alan . bateman]

Changeset: 1a86c367c5c7
Author:    alanb
Date:      2016-04-11 18:45 +0100
URL:       http://hg.openjdk.java.net/jigsaw/jake/langtools/rev/1a86c367c5c7

Configure jtreg to use new form of -Xpatch

! test/TEST.ROOT