[llvm] [BOLT][AArch64] Implemented createDummyReturnFunction. (PR #96626)

[Amir Ayupov via llvm-commits]

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@@ -2041,10 +2041,10 @@ class MCPlusBuilder {
     return InstructionListType();
   }
 
-  virtual InstructionListType createDummyReturnFunction(MCContext *Ctx) const {
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aaupov wrote:

Agree but let's keep renaming separate. Can rename as follow-up NFC change

https://github.com/llvm/llvm-project/pull/96626