[clang] [llvm] Enable fexec-charset option (PR #138895)

[Sergei Barannikov via llvm-commits]

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@@ -1817,6 +1843,10 @@ CharLiteralParser::CharLiteralParser(const char *begin, const char *end,
     largest_character_for_kind = 0x7Fu;
   }
 
+  llvm::TextEncodingConverter *Converter = nullptr;
+  if (!isUTFLiteral(Kind) && !isWideLiteral(Kind))
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s-barannikov wrote:

```suggestion
  if (isOrdinary())
```

https://github.com/llvm/llvm-project/pull/138895