[Bug testsuite/62234] warnings/errors from LTO cannot be tested

[egallager at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62234

--- Comment #7 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to David Malcolm from comment #6)
> I added support for this in r256801:
>   dg-lto-warning and dg-lto-message
>     https://gcc.gnu.org/ml/gcc-patches/2018-01/msg00257.html

So can this be closed as FIXED then?