update virtualbox ext to 4.3.26

[cfoellmann]

No description provided.

[ferventcoder]

@cfoellmann I take it this never made it in?

[ferventcoder]

Although it appears that there have been updates since.

[cfoellmann]

I didn't follow up since updating virtual box through Choco did give me too much trouble.
Should be an automatic package anyway

[ferventcoder]

This was a pull request - it was closed. I was simply stating that the PR was not accepted but it appears that the package itself has moved forward since then.