[builtins] Add ReturnReceiver builtin

src/builtins/builtins-internal.cc

Index: src/builtins/builtins-internal.cc
diff --git a/src/builtins/builtins-internal.cc b/src/builtins/builtins-internal.cc
index 741537eb462e20e63e4e4051ba6bd0089b9e0c65..f94ed0c16f2f6de091dfbd7da2f3077159fd3a89 100644
--- a/src/builtins/builtins-internal.cc
+++ b/src/builtins/builtins-internal.cc
@@ -309,5 +309,10 @@ void Builtins::Generate_NewRestParameterElements(
   assembler.Return(assembler.EmptyFixedArrayConstant());
 }
 
+void Builtins::Generate_ReturnReceiver(compiler::CodeAssemblerState* state) {
+  CodeStubAssembler assembler(state);
+  assembler.Return(assembler.Parameter(0));
+}
+
 }  // namespace internal
 }  // namespace v8