[llvm] [MemProf] Print full context hash when reporting hinted bytes (PR #114465)

[Snehasish Kumar via llvm-commits]

https://github.com/snehasish commented:

Looks good overall. 

Is there any noticable impact on compile time and memory when this is enabled? 
What is the size impact to the summary?

https://github.com/llvm/llvm-project/pull/114465