[1791] moved <cstdlib> to test_client.cc now the latter calls system().

src/lib/datasrc/tests/test_client.cc

@@ -27,6 +27,7 @@
 #include <boost/bind.hpp>
 #include <boost/shared_ptr.hpp>
 
+#include <cstdlib>
 #include <istream>
 #include <fstream>
 

src/lib/datasrc/tests/zone_finder_context_unittest.cc

@@ -34,7 +34,6 @@
 
 #include <fstream>
 #include <sstream>
-#include <cstdlib>
 #include <vector>
 
 using namespace std;