[clang] [Clang] Ensure that .fini_array is available with -fno-use-cxa-atexit (PR #211963)

[Eli Friedman via cfe-commits]

efriedma-quic wrote:

Running C++ destructors using .fini_array is nowhere near compliant with standard requirements; the standard requires destructors to run in a specific order.  And that order exists for good reasons: destruction in the wrong order is likely to lead to use-after-free, or destroying objects which were never constructed.

Are you sure you can't use `-fno-c++-static-destructors`?  That suppresses atexit calls in a way that's much less likely to explode.

https://github.com/llvm/llvm-project/pull/211963