[llvm] [MemProf] Don't skip direct recursion in function summary (PR #78264)

[via llvm-commits]

lifengxiang1025 wrote:

> I remembered the reason I was handling direct recursion differently. I wonder if we can fix the assert that was firing in this case (and check that we do get the expected cloning)?

Thanks! I'll fix the assert and add test case soon.

https://github.com/llvm/llvm-project/pull/78264