add test codes, it can't run

utils/SeriesPoolTest.cpp

@@ -0,0 +1,17 @@
+#include<iostream>
+#include<hgl/type/SeriesPool.h>
+#include<hgl/u>
+
+using namespace std;
+using namespace hgl;
+
+constexpr int POOL_MAX_COUNT=10;
+
+int os_main(int,os_char **)
+{
+    SeriesU8 sp(POOL_MAX_COUNT);
+
+    cout<<"Series pool MaxCount="<<sp.GetMaxCount()<<endl;
+
+
+}