[llvm][Support] Add quotes around option name (#81784)

Author: lamb-j

llvm/include/llvm/Support/CommandLine.h

@@ -878,7 +878,7 @@ template <class DataType> class parser : public generic_parser_base {
   void addLiteralOption(StringRef Name, const DT &V, StringRef HelpStr) {
 #ifndef NDEBUG
     if (findOption(Name) != Values.size())
-      report_fatal_error("Option " + Name + " already exists!");
+      report_fatal_error("Option '" + Name + "' already exists!");
 #endif
     OptionInfo X(Name, static_cast<DataType>(V), HelpStr);
     Values.push_back(X);