add system #include that is lacking

git-svn-id: http://svn.eurecom.fr/openair4G/trunk@6638 818b1a75-f10b-46b9-bf7c-635c3b92a50f

openair-cn/SCTP/sctp_eNB_task.c

@@ -31,6 +31,8 @@
 #include <stdint.h>
 #include <errno.h>
 #include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
 
 #include <sys/types.h>
 #include <sys/socket.h>