[llvm] [memprof] Fix typos in serializedSizeV0 and serializedSizeV2 (PR #88629)

[Teresa Johnson via llvm-commits]

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@@ -42,7 +42,7 @@ size_t IndexedAllocationInfo::serializedSize(IndexedVersion Version) const {
 }
 
 static size_t serializedSizeV0(const IndexedMemProfRecord &Record) {
-  size_t Result = sizeof(GlobalValue::GUID);
+  size_t Result = sizeof(uint64_t);
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teresajohnson wrote:

Can you add a comment here and in the V1 version for what this is reserving space for? E.g. similar to the comment further below on line 49.

https://github.com/llvm/llvm-project/pull/88629