[Bug bootstrap/70200] builing gcc with -lfto without libunwind

[dilyan.palauzov at aegee dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70200

--- Comment #1 from Дилян Палаузов <dilyan.palauzov at aegee dot org> ---
I was wrong, having libunwind, with --enable-cxx-exceptions, thus exporting
_Unwind_Resume(), does not help in any way.