Review request for JMC-6460: Simple mechanism for building JMC under docker.

[Marcus Hirt]

Hi all,

Please review this patch from Will Thames to provide a simple mechanism
for building JMC under docker.

Jira:   https://bugs.openjdk.java.net/browse/JMC-6460
Patch:  http://cr.openjdk.java.net/~hirt/JMC-6460/webrev.0/

Kind regards,
Marcus