linux-next: add utrace tree

[Alexey Dobriyan]

On Sat, Jan 23, 2010 at 2:22 AM, Linus Torvalds
<torvalds at linux-foundation.org> wrote:
> This is why when somebody brought up "you could do a seccomp-like thing on
> top of utrace" that my reaction was and is just totally negative. It shows
> all the wrong kinds of tying things together.

seccomp-via-utrace should be just removed to be honest before its users.
It entered the tree because it was very small and simple.
If rewritten, it no longer is small and simple because of whole kernel/utrace.c.