[llvm] [BOLT] Always treat function entry as code (PR #160161)

[Maksim Panchenko via llvm-commits]

maksfb wrote:

> It looks like this covers the case I listed [here](https://github.com/llvm/llvm-project/pull/160143#pullrequestreview-3289288584) for PR #160143?

Good question. `foo` has to be marked as a function (`ST_FUNC`) for it to take precedence over `$d`, otherwise, the bytes at the location are still treated as data.

Thanks for reviews.

https://github.com/llvm/llvm-project/pull/160161