hg: jdk9/hs-comp: 8150646: Add support for blocking compiles though whitebox API

[nils.eliasson at oracle.com]

Changeset: ad7fd6bb92e0
Author:    simonis
Date:      2016-03-03 16:20 +0100
URL:       http://hg.openjdk.java.net/jdk9/hs-comp/rev/ad7fd6bb92e0

8150646: Add support for blocking compiles though whitebox API
Reviewed-by: kvn, ppunegov, simonis, neliasso
Contributed-by: nils.eliasson at oracle.com, volker.simonis at gmail.com

! test/lib/sun/hotspot/WhiteBox.java