[Bug sanitizer/88684] [7/8/9 Regression] Please make SANITIZER_NON_UNIQUE_TYPEINFO a runtime flag (or always true)

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88684

--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> ---
I created upstream patch candidate:
https://reviews.llvm.org/D56485