[clang] [AArch64][Clang] Fix linker error for function multiversioning (PR #74358)

[Jon Roelofs via cfe-commits]

================
@@ -1752,8 +1754,10 @@ static void AppendTargetClonesMangling(const CodeGenModule &CGM,
   const TargetInfo &TI = CGM.getTarget();
   if (TI.getTriple().isAArch64()) {
----------------
jroelofs wrote:

Right, it's too bad this incompatibility is baked into the spec. Are there other reasons why this can't be supported?

https://github.com/llvm/llvm-project/pull/74358