[fix] malloc conflict problem

Signed-off-by: MurphyZhao <d2014zjt@163.com>

iperf/iperf.c

@@ -10,6 +10,7 @@
 
 #include <string.h>
 #include <stdint.h>
+#include <stdlib.h>
 #include <stdio.h>
 #include <fcntl.h>
 #include <unistd.h>