hg: graal/graal: buildjmhdeps should use Graal for JAVA_HOME

[doug.simon at oracle.com]

Changeset: 5522e8ffa5f5
Author:    Tom Rodriguez <tom.rodriguez at oracle.com>
Date:      2015-07-10 18:06 -0700
URL:       http://hg.openjdk.java.net/graal/graal/rev/5522e8ffa5f5

buildjmhdeps should use Graal for JAVA_HOME

! mx.graal/mx_graal.py