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

[dmalcolm at gcc dot gnu.org]

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

David Malcolm <dmalcolm at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |dmalcolm at gcc dot gnu.org

--- Comment #6 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
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