[libc-commits] [libc] Add _exit() according to _Exit() implementation (PR #87184)

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maebex wrote:

@nickdesaulniers sure thing, I will keep the eyes open for another good first issue. So far I am not really sure what precise steps to take care of for the process anyway, e.g. where and which tests to add, configs, etc.

https://github.com/llvm/llvm-project/pull/87184