fix musl compile

package/l2tpns/Makefile

@@ -5,7 +5,7 @@ include ${TOPDIR}/rules.mk
 
 PKG_NAME:=		l2tpns
 PKG_VERSION:=		2.1.21
-PKG_RELEASE:=		1
+PKG_RELEASE:=		2
 PKG_MD5SUM:=		385c58055723ebc6c38062acd2db9c2c
 PKG_DESCR:=		A layer 2 tunneling protocol network server (LNS)
 PKG_SECTION:=		net/security

package/l2tpns/patches/patch-cli_c

@@ -0,0 +1,10 @@
+--- l2tpns-2.1.21.orig/cli.c	2005-12-06 10:43:42.000000000 +0100
++++ l2tpns-2.1.21/cli.c	2013-12-21 14:10:49.000000000 +0100
+@@ -4,6 +4,7 @@
+ char const *cvs_name = "$Name: release_2_1_21 $";
+ char const *cvs_id_cli = "$Id: cli.c,v 1.71 2005/12/06 09:43:42 bodea Exp $";
+ 
++#include <bits/fcntl.h>
+ #include <stdio.h>
+ #include <stddef.h>
+ #include <stdarg.h>

package/l2tpns/patches/patch-cluster_c

@@ -0,0 +1,10 @@
+--- l2tpns-2.1.21.orig/cluster.c	2006-12-02 15:09:14.000000000 +0100
++++ l2tpns-2.1.21/cluster.c	2013-12-21 14:23:14.000000000 +0100
+@@ -2,6 +2,7 @@
+ 
+ char const *cvs_id_cluster = "$Id: cluster.c,v 1.50.2.1 2006/12/02 14:09:14 bodea Exp $";
+ 
++#include <bits/fcntl.h>
+ #include <stdio.h>
+ #include <stdlib.h>
+ #include <stdarg.h>