[llvm] [llvm-objdump][ELF]Fix crash when reading strings from .dynstr (PR #125679)

[Fangrui Song via llvm-commits]

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@@ -63,14 +63,22 @@ static Expected<StringRef> getDynamicStrTab(const ELFFile<ELFT> &Elf) {
   if (!DynamicEntriesOrError)
     return DynamicEntriesOrError.takeError();
 
+  typename ELFT::Xword StringTableSize{0};
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MaskRay wrote:

`typename ELFT::Xword StringTableSize = 0;`

https://github.com/llvm/llvm-project/pull/125679