hg: graal/graal: client-nograal is supported on Mac

[doug.simon at oracle.com]

Changeset: 750db34c9fe1
Author:    Tom Rodriguez <tom.rodriguez at oracle.com>
Date:      2015-01-08 10:20 -0800
URL:       http://hg.openjdk.java.net/graal/graal/rev/750db34c9fe1

client-nograal is supported on Mac

! mx/mx_graal.py