[compiler-rt] [llvm] [ORC][Runtime] Add `dlupdate` for MachO (PR #97441)

[via llvm-commits]

SahilPatidar wrote:

I don't think we need this part?
```cpp
  // Call back to the JIT to push the initializers.
  Expected<MachOJITDylibDepInfoMap> DepInfo((MachOJITDylibDepInfoMap()));
  // Unlock so that we can accept the initializer update.
  JDStatesLock.unlock();
  if (auto Err = WrapperFunction<SPSExpected<SPSMachOJITDylibDepInfoMap>(
          SPSExecutorAddr)>::call(&__orc_rt_macho_push_initializers_tag,
                                  DepInfo, ExecutorAddr::fromPtr(JDS.Header)))
    return Err;
  JDStatesLock.lock();

  if (!DepInfo)
    return DepInfo.takeError();
```

https://github.com/llvm/llvm-project/pull/97441