[extra-cmake-modules] modules: Revert "use the NAME_PREFIX only for the test, not for the executable"

[Alex Merry]

On 07/06/14 23:31, Alex Merry wrote:
> OK, since this seems to be what pretty much everyone who has said
> anything to me about this wants, let's make the name prefix only for the
> test name, then. I won't have time until Friday. If anyone wants to
> create an RR for it before then, I'll just say that the documentation
> needs to make the behaviour and the intended use clear.

So... I didn't manage to do this yesterday (ill...), and I'm away for
the weekend, so committing a change right now that will probably break a
bunch of stuff seems like a bad idea. I should be able to find some time
next week to do it, though.

Alex