[Beignet] [PATCH] GBE: Use NOT instruction for unordered FCMP

[Song, Ruiling]

Yes, below is totally wrong. As NOT will take bool value, so we need take some extra care here for master branch.
I will send the patch rebased on your newest bool implementation later.

Thanks!
Ruiling
>            break;
> +        case ir::OP_NOT: sel.NOT(dst, src); break;
>          case ir::OP_RNDD: sel.RNDD(dst, src); break;