hg: code-tools/jcstress: Runners: better diagnostics when VM options are rejected.

[ashipile at redhat.com]

Changeset: 3159862dbcdb
Author:    shade
Date:      2016-11-17 13:02 +0100
URL:       http://hg.openjdk.java.net/code-tools/jcstress/rev/3159862dbcdb

Runners: better diagnostics when VM options are rejected.

! jcstress-core/src/main/java/org/openjdk/jcstress/JCStress.java
! jcstress-core/src/main/java/org/openjdk/jcstress/vm/VMSupport.java