[clang] [Clang] disallow selectany on non-global-variable declarations (PR #189641)

[Aaron Ballman via cfe-commits]

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@@ -4500,6 +4500,8 @@ def DLLImportStaticLocal : InheritableAttr, TargetSpecificAttr<TargetHasDLLImpor
 
 def SelectAny : InheritableAttr {
   let Spellings = [Declspec<"selectany">, GCC<"selectany">];
+  let Subjects = SubjectList<[NonParmVar, Function], ErrorDiag,
+                             "variable declarations with external linkage">;
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AaronBallman wrote:

Why is `Function` in the list of subjects?

https://github.com/llvm/llvm-project/pull/189641