[Bug libstdc++/91153] New test case 29_atomics/atomic_float/1.cc execution test fails

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91153

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It's just a buggy test, the code in the library is fine. I'll fix the test for
GCC 10 if I get a chance, but it's not a priority.