[clang] [wip][Clang-Repl] Add custom function as lambda in launchExecutor and fetch PID of launched executor (PR #147478)

[Vipul Cariappa via cfe-commits]

================
@@ -155,6 +163,8 @@ launchExecutor(StringRef ExecutablePath, bool UseSharedMemory,
              << ExecutorPath.get() << "\"\n";
       exit(1);
     }
+  } else {
+    LaunchedExecutorPID.push_back(ChildPID);
   }
   // else we're the parent...
 
----------------
Vipul-Cariappa wrote:

```suggestion
  }
  // else we're the parent...
  LaunchedExecutorPID.push_back(ChildPID);
```

Does this work?

https://github.com/llvm/llvm-project/pull/147478