Re-add ua_log_stdout.h temporarily to fix OS X issue in another PR

arch/ua_network_tcp.c

@@ -10,6 +10,7 @@
 
 #define UA_INTERNAL
 #include "ua_network_tcp.h"
+#include "ua_log_stdout.h"
 #include "../deps/queue.h"
 #include "ua_util.h"