[clang] [lldb] [clang][AST] fix ast-print of extern <lang> with >=2 declarators, fixed (PR #93913)

[Aaron Ballman via cfe-commits]

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@@ -2380,7 +2380,7 @@ FunctionDecl *Sema::CreateBuiltin(IdentifierInfo *II, QualType Type,
   }
 
   FunctionDecl *New = FunctionDecl::Create(Context, Parent, Loc, Loc, II, Type,
-                                           /*TInfo=*/nullptr, SC_Extern,
+                                           /*TInfo=*/nullptr, SC_None,
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AaronBallman wrote:

Ah, you're right, it's only *objects* declared at local scope that have no linkage (the following paragraph), not *functions*.

https://github.com/llvm/llvm-project/pull/93913