[noise] Test Vector Specification

[David Wong]

> This has always been explicitly stated:

Yeah but I couldn't find where it was explicitly stated :) (a readme
next to the test vectors could have helped)
If it becomes an official document I'd imagine this would be stated in
it so it's fine.


> These are not redundant. In addition to testing for success, I also
> want to test for failure. For example, if I specify a different prologue

I see! My bad

David