[libc-commits] [libc] [libc][config] Add malloc as baremetal arm entrypoint (PR #95827)

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PiJoules wrote:

> Can you also include it in `libc/config/baremetal/riscv/entrypoints.txt`?

Done. 

> What about `calloc` and `free`?

Those symbols are included with the `malloc` cmake target, but at some point I should also split them into their separate files/targets.

https://github.com/llvm/llvm-project/pull/95827