[Nestedvm] license boilerplate

[Adam Megacz]

"Logan O'Sullivan Bruns" <logan at gedanken.org> writes:
> I want to use nestedvm's runtime in a project at my work however it
> has been pointed out to me that the text in the runtime sources
> actually says "Apache Public Source License 2.0" instead of "Apache
> License, Version 2.0". Assuming this is an oversight I was wondering
> if you would consider changing it? Perhaps even consider using the
> recommended boilerplate as described here?

Done.

> Also, it is confusing that under the doc directory there is a copy of
> LGPL v2.1. Maybe you could clarify what portions this applies to?

There are some files in src/tests that need this.

  - a