Fix remaining test files: replace POSIX headers with platform_compat.h

tests/test_u_async_performance.c

@@ -7,12 +7,12 @@
 #include <stdlib.h>
 #include <string.h>
 #include <stdint.h>
-#include <unistd.h>
+#include "../lib/platform_compat.h"
 #include <sys/time.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <fcntl.h>
+
+
+
+
 #include <errno.h>
 
 #include "u_async.h"