[NEW PORT] / [RE-Added] (Deleted due to deprecation) misc/rumprun: Unikernel and toolchain for various platforms

[tobik]

Summary

After this port was marked BROKEN in rP476365, DEPRECATED in rP478728 and removed in rP484289 (sorry!) - here's a patch that allows this port to build on modern GCCs.

There is an upstream efforts at https://github.com/rumpkernel/rumprun/pull/127.

Test Plan

Tested with poudriere testport on amd64 and i386, and manual smoke tests.

[0mp]

I'll take a look.

[0mp]

• Re-add misc/rumprun
• Update to g20180408
• Clean up variables and targets

[tobik]

This seems to have been committed in rP501246, but Phabricator did not close it for some reason?