Transformation noise for borgs

Someone requested I port this weeks ago and I forgot about it.

When borgs choose a module, they transform silently which is pretty lame. The sound I've chosen for this is a license-free noise that sounds like the rather iconic transformers sound, and as far as I know that doesn't cross into any bad places legally. However, if someone has a less silly sound for it I'm open to suggestions, but it's the first thing that came to mind when looking for and it's pretty fun (it's been on the NT codebase for weeks now and people seem to like it).