[Bug c++/81668] LTO ODR warnings are not helpful

[steinar+gcc at gunderson dot no]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81668

--- Comment #16 from Steinar H. Gunderson <steinar+gcc at gunderson dot no> ---
Yes, I'm fine with closing this bug; the spurious cases are gone, and the
traces seem to be genuinely helpful now.