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

[Sergei Barannikov via cfe-commits]

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@@ -1751,6 +1783,7 @@ CharLiteralParser::CharLiteralParser(const char *begin, const char *end,
   HadError = false;
 
   Kind = kind;
+  const TextEncodingConfig &TEC = PP.getTextEncodingConfig();
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s-barannikov wrote:

Move closer to the first (only?) use

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