Fix utest build fail

trunk/src/app/srs_app_conn.cpp

@@ -24,6 +24,7 @@
 #include <srs_app_conn.hpp>
 
 #include <netinet/tcp.h>
+#include <algorithm>
 using namespace std;
 
 #include <srs_kernel_log.hpp>

trunk/src/utest/srs_utest_service.cpp

@@ -38,6 +38,7 @@ using namespace std;
 #include <srs_service_utility.hpp>
 #include <srs_service_http_client.hpp>
 #include <srs_service_rtmp_conn.hpp>
+#include <srs_service_conn.hpp>
 #include <sys/socket.h>
 #include <netdb.h>