[llvm] [AArch64] Rename VariantKind to Specifier (PR #132595)

[Fangrui Song via llvm-commits]

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@@ -338,7 +338,7 @@ class AArch64AsmParser : public MCTargetAsmParser {
   bool parsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc) override;
 
   static bool classifySymbolRef(const MCExpr *Expr,
-                                AArch64MCExpr::VariantKind &ELFRefKind,
+                                AArch64MCExpr::Specifier &ELFSpec,
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MaskRay wrote:

`DarwinRefKind`, while still using `MCSymbolRefExpr` (I do not plan to migrate it to AArch64MCExpr but hope someone could do so), will be renamed to `DarwinSpec`. Therefore, I am preferring `ELFSpec`.

https://github.com/llvm/llvm-project/pull/132595