[Distributed] Fix handling indirect @in convention params in distributed funcs

rdar://111887706

Author: ktoso

lib/IRGen/GenDistributed.cpp

@@ -475,6 +475,7 @@ void DistributedAccessor::decodeArgument(unsigned argumentIdx,
 
     // Remember to deallocate a copy.
     AllocatedArguments.push_back(stackAddr);
+    arguments.add(stackAddr.getAddressPointer());
     break;
   }