Update dependencies to pull in gwacl rev 239
Test failed, so update gwacl
Merge pull request #1244 from wallyworld/new-azure-instance-types

Update dependencies to pull in gwacl rev to update instance types

Fixes: https://bugs.launchpad.net/juju-core/+bug/1389422

Update dependencies to pull in gwacl rev 239 so that new Azure instance types are available.


(Review request: http://reviews.vapour.ws/r/555/)