[llvm] Reland "[llvm-readobj] Dump callgraph section info for ELF" (PR #176260)

[James Henderson via llvm-commits]

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@@ -8336,9 +8341,7 @@ template <class ELFT> void LLVMELFDumper<ELFT>::printCallGraphInfo() {
                       this->FileName);
         return;
       }
-
-      RelocSymTab = unwrapOrError(this->FileName,
-                                  this->Obj.getSection(CGRelSection->sh_link));
+      RelocSymTab = SymtabOrErr.get();
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jh7370 wrote:

`RelocSymTab = *SymtabOrErr;` would be more idiomatic.

https://github.com/llvm/llvm-project/pull/176260