[llvm] [Bolt] fix a wrong relocation update issue with weak references (PR #69136)

[Vladislav Khmelevsky via llvm-commits]

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@@ -1974,6 +1974,14 @@ bool RewriteInstance::analyzeRelocation(
   if (!Relocation::isSupported(RType))
     return false;
 
+  auto isWeakReference = [](const SymbolRef &Symbol) {
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yota9 wrote:

IsWeakUndReference

https://github.com/llvm/llvm-project/pull/69136