[llvm] [memprof] Add a version field to MemProf (PR #85344)

[Snehasish Kumar via llvm-commits]

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@@ -1165,6 +1165,9 @@ inline std::unique_ptr<Summary> allocSummary(uint32_t TotalSize) {
                                       Summary(TotalSize));
 }
 
+// Version 1: First version
+constexpr uint64_t MemProfVersion = 1;
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snehasish wrote:

Perhaps would ProfileData/MemProf.h be a better place to declare this const?

https://github.com/llvm/llvm-project/pull/85344