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

[Paschalis Mpeis via llvm-commits]

https://github.com/paschalis-mpeis approved this pull request.

Looks good.

> Check that if a data marker is present at the start of a function, the underlying bytes are still treated as code.

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

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