[Bug bootstrap/67363] [6 Regression] r227188 breaks build for mingw-w64

[ismail at i10z dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67363

--- Comment #13 from İsmail Dönmez <ismail at i10z dot com> ---
(In reply to John David Anglin from comment #12)
> Created attachment 36321 [details]
> Patch
> 
> I sent this change this morning to gcc-patches but it seems to have
> disappeared.

The patch declares the functions but those functions do not exist on mingw-w64,
seems to be this will just fail with an undefined symbol error.