[PATCH] MC: Don't emit min version directives when -fno-integrated-as is on

[Rafael Espíndola]

> If cctools as isn't supported, perhaps we should make -no-integrated-as
> shell out to `clang -cc1as` on Darwin. Users may be relying on
> -no-integrated-as implying cctools as quirks, though.

It is probably a good idea. Since cctools' as can't handle clang
output, the only use case that might be broken by the change is "clang
-c -no-integrated-as foo.s", no?

Cheers,
Rafael