[libc-commits] [libc] [libc] Provide __libc_{init, fini}_array for baremetal (PR #90828)

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https://github.com/lntue approved this pull request.

LGTM.

OTOH, I see these functionalities also presented `startup/amdgpu/start.cpp`, `startup/gpu/nvptx/start.cpp`, and `startup/linux/do_start.cpp`.  @jhuber6 is this something that we can refactor to a common target?

https://github.com/llvm/llvm-project/pull/90828