Add <ctime> header for time() in pdeque/pvector tests

src/tests/util/pdeque.cpp

@@ -8,6 +8,7 @@ Author: Leonardo de Moura
 #include <cstdlib>
 #include <deque>
 #include <vector>
+#include <ctime>
 #include "util/test.h"
 #include "util/pdeque.h"
 using namespace lean;

src/tests/util/pvector.cpp

@@ -7,6 +7,7 @@ Author: Leonardo de Moura
 #include <iostream>
 #include <cstdlib>
 #include <vector>
+#include <ctime>
 #include "util/test.h"
 #include "util/pvector.h"
 #include "util/timeit.h"