[llvm] [memprof] Use BLAKE for FrameId (PR #109501)

[Snehasish Kumar via llvm-commits]

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@@ -312,20 +314,13 @@ struct Frame {
   // hashing from llvm ADT since we are going to persist the hash id, the hash
   // combine algorithm in ADT uses a new randomized seed each time.
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snehasish wrote:

Update this comment too?

https://github.com/llvm/llvm-project/pull/109501