[Bug libstdc++/77413] [7 regression] experimental/numeric/gcd.cc etc. FAIL

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77413

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Almost certainly r240656 which replaces the problematic use of std::abs with an
always-constexpr __abs function (which r240723 then renamed to __abs_integral).

So I think this is a dup of PR 77801