[llvm] r209309 - MC: loosen an overzealous assertion

[Rafael Espíndola]

>> Why does this test require assertions?
>
>
> The test is to ensure that the driver doesn't crash due to the assertion.
> The actual handling of it wasn't changed.  I could be convinced that the
> test doesn't add much though.

I think that the point is valid with and without asserts, so the
REQUIRES line can be removed.

Cheers,
Rafael