Fix unity build

refs #9471

lib/cli/apisetupcommand.cpp

@@ -21,6 +21,7 @@
 #include "cli/apisetuputility.hpp"
 #include "base/logger.hpp"
 #include "base/console.hpp"
+#include <iostream>
 
 using namespace icinga;
 namespace po = boost::program_options;