[llvm] r209387 - MC: formalise some assertions into proper errors

[Rafael Espíndola]

> --- llvm/trunk/test/MC/COFF/invalid-def.s (added)
> +++ llvm/trunk/test/MC/COFF/invalid-def.s Wed May 21 21:18:10 2014
> @@ -0,0 +1,6 @@
> +# RUN: not llvm-mc -triple i686-windows -filetype obj -o /dev/null %s
> +# REQUIRES: asserts

Why? Isn't the point that we now provide an actual error message
regardless of asserts?

Cheers,
Rafael