[NFC] Fixes example build failure caused by c143b77b30fc23f70aac94be66e412651771c0fc

llvm/examples/ModuleMaker/ModuleMaker.cpp

int main() {
   Value *Two = ConstantInt::get(Type::getInt32Ty(Context), 2);
   Value *Three = ConstantInt::get(Type::getInt32Ty(Context), 3);
 
   // Create the add instruction... does not insert...
   Instruction *Add = BinaryOperator::Create(Instruction::Add, Two, Three,
                                             "addresult");
 
   // explicitly insert it into the basic block...
-  BB->getInstList().push_back(Add);
+  Add->insertAt(BB, BB->end());
 
   // Create the return instruction and add it to the basic block
-  BB->getInstList().push_back(ReturnInst::Create(Context, Add));
+  ReturnInst::Create(Context, Add)->insertAt(BB, BB->end());
 
   // Output the bitcode file to stdout
   WriteBitcodeToFile(*M, outs());
 
   // Delete the module and all of its contents.
   delete M;
   return 0;
 }