hg: jigsaw/jake/jdk: jlink changes for osName, osArch and osVersion. Missed a new test library source.

[sundararajan.athijegannathan at oracle.com]

Changeset: 70ecebe1b74f
Author:    sundar
Date:      2017-02-24 12:11 +0530
URL:       http://hg.openjdk.java.net/jigsaw/jake/jdk/rev/70ecebe1b74f

jlink changes for osName, osArch and osVersion. Missed a new test library source.

+ test/lib/testlibrary/ModuleTargetHelper.java