[Bug bootstrap/81864] building gcc 8 with --enable-gather-detailed-mem-stats fails on x86-64, arm and aarch64 under gnu linux

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81864

--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
So started with r249991 where a new static variable of hash_table was added.
Well, the implementation of memory statistics is bit fragile as it requires
that static construction of mem_alloc_description<T> X happens before any other
tracked data structure is created. I know that Jakub is not friend of addition
of static data structures, where pointer type is preferred variant. I've got
patch that I'm going to test.