[llvm] r201110 - Fix an old FIXME. LDPO_PIE is available since 2.23, realeased 2012-10-22.

[Rafael Espíndola]

> Why not;
>
> #ifndef LDPO_PIE
> #define LDPO_PIE 3
> #endif
>
> Its cleaner this way.

Yes, that is better.  Thanks!

Cheers,
Rafael