Try using symbol not function name

Author: kastiglione

lldb/source/Target/StackFrameRecognizer.cpp

@@ -151,7 +151,8 @@ StackFrameRecognizerManager::GetRecognizerForFrame(StackFrameSP frame) {
       if (!entry.module_regexp->Execute(module_name.GetStringRef()))
         continue;
 
-    ConstString function_name = symctx.GetFunctionName(entry.symbol_mangling);
+    ConstString function_name =
+        symbol->GetMangled().GetName(entry.symbol_mangling);
 
     if (!entry.symbols.empty())
       if (!llvm::is_contained(entry.symbols, function_name))