iptables: fixed build when linux-src package is installed

The linux-src package installs bare kernel headers which are not
usable by userspace applications.
Because we used the '--with-ksource' configure option the bare
linux headers are being used instead of the cleaned up ones which
are installed by the the linux-header package and thus the buils
badly fails.

network/iptables/iptables.conf

@@ -2,7 +2,7 @@
 # This copyright note is auto-generated by ./scripts/Create-CopyPatch.
 #
 # Filename: package/.../iptables/iptables.conf
-# Copyright (C) 2007 - 2008 The OpenSDE Project
+# Copyright (C) 2007 - 2012 The OpenSDE Project
 # Copyright (C) 2004 - 2006 The T2 SDE Project
 # Copyright (C) 1998 - 2003 Clifford Wolf
 #
@@ -14,8 +14,6 @@
 # GNU General Public License can be found in the file COPYING.
 # --- SDE-COPYRIGHT-NOTE-END ---
 
-var_append confopt ' ' "--with-ksource=$root/usr/src/linux"
-
 if [ "$SDECFG_PKG_IPTABLES_DEVEL" != 0 ] ; then
 	var_append confopt ' ' "--enable-devel"
 	var_append confopt ' ' "--enable-libipq"