[libc-commits] [libc] [libc][c23] add memset_explicit (PR #83577)

[Nick Desaulniers via libc-commits]

nickdesaulniers wrote:

[Linking to more thoughts here](https://discourse.llvm.org/t/implement-memset-explicit/77312/10?u=nickdesaulniers)

https://github.com/llvm/llvm-project/pull/83577