[libc-commits] [libc] [libc] move __stack_chk_fail to src/ from startup/ (PR #75863)

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https://github.com/michaelrj-google approved this pull request.

LGTM, though if possible it would be nice to add a test to check the actual stack check mechanism (i.e. overwriting the stack cookie intentionally to cause a crash)

https://github.com/llvm/llvm-project/pull/75863