[patch] Don't warn on unused -fno-lto

[Chandler Carruth]

LGTM I guess. It seems icky, but we already do it for -flto, so it makes no
sense to be inconsistent.

On Fri, Jan 2, 2015 at 2:50 PM, Rafael Espíndola <rafael.espindola at gmail.com
> wrote:

> It is somewhat common for CFLAGS to be used with .s files. We were
> already ignoring -flto. This patch just does the same for -fno-lto.
>
> Cheers,
> Rafael
>
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