[Bug libstdc++/92143] std::pmr::polymorphic_allocator throws bad_alloc on macOS

[gcc-bugzilla at daryl dot haresign.com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92143

--- Comment #3 from Daryl Haresign <gcc-bugzilla at daryl dot haresign.com> ---
$ g++-9 -E -dM test.cc | grep ALIGNED
#define _GLIBCXX_HAVE_ALIGNED_ALLOC 1