Move MakeRwys to own lib

xplugin/xPluginWin.cpp

@@ -1,6 +1,8 @@
 #include <cstdio>
 #include <windows.h>
 
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wunused-parameter"
 BOOL APIENTRY DllMain(HANDLE hModule,
                       DWORD ul_reason_for_call,
                       LPVOID lpReserved)
@@ -15,3 +17,5 @@ BOOL APIENTRY DllMain(HANDLE hModule,
   }
   return TRUE;
 }
+
+#pragma clang diagnostic pop