hg: graal/graal-jvmci-8: rename classes to denote jvmci version

[doug.simon at oracle.com]

Changeset: 994b87797b9d
Author:    Doug Simon <doug.simon at oracle.com>
Date:      2016-01-15 16:17 +0100
URL:       http://hg.openjdk.java.net/graal/graal-jvmci-8/rev/994b87797b9d

rename classes to denote jvmci version

! mx.jvmci/mx_jvmci.py