[llvm] [llvm-ifs] Treat unknown symbol types as error. (PR #75872)

[James Henderson via llvm-commits]

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@@ -201,6 +201,12 @@ Expected<std::unique_ptr<IFSStub>> ifs::readIFSFromBuffer(StringRef Buf) {
           "IFS arch '" + *Stub->Target.ArchString + "' is unsupported");
     Stub->Target.Arch = eMachine;
   }
+  for (const auto &item : Stub->Symbols) {
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jh7370 wrote:

```suggestion
  for (const auto &Item : Stub->Symbols) {
```

https://github.com/llvm/llvm-project/pull/75872