[compiler-rt] [llvm] [InstrFDO]Allow indexed profile reader to parse compatible future versions and returns errors for incompatible ones. (PR #88212)

[Kazu Hirata via llvm-commits]

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@@ -1200,6 +1213,22 @@ struct Header {
   uint64_t BinaryIdOffset = 0;
   uint64_t TemporalProfTracesOffset = 0;
   uint64_t VTableNamesOffset = 0;
+  // Records the on-disk byte size of the header.
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kazutakahirata wrote:

I'd drop the verb because the variable just sits there.

```suggestion
  // The on-disk byte size of the header.
```

https://github.com/llvm/llvm-project/pull/88212