Incorporate Threadpool in Eigen Core
diff --git a/Eigen/ThreadPool b/Eigen/ThreadPool
index febb187..c6e2cee 100644
--- a/Eigen/ThreadPool
+++ b/Eigen/ThreadPool
@@ -71,6 +71,7 @@
 #include "src/ThreadPool/ThreadEnvironment.h"
 #include "src/ThreadPool/Barrier.h"
 #include "src/ThreadPool/NonBlockingThreadPool.h"
+#include "src/ThreadPool/CoreThreadPoolDevice.h"
 // IWYU pragma: end_exports
 
 #include "src/Core/util/ReenableStupidWarnings.h"