iptables: only check libnetfilter-conntrack when libnfnetlink is enabled
Package libnetfilter-conntrack depends on package libnfnetlink. iptables
checks package libnetfilter-conntrack whatever its package config
libnfnetlink is enabled or not. When libnfnetlink is disabled but
package libnetfilter-conntrack exists, it fails randomly with:
| In file included from .../iptables/1.4.21-r0/iptables-1.4.21/extensions/libxt_connlabel.c:8:0:
| .../tmp/sysroots/qemumips/usr/include/libnetfilter_conntrack/libnetfilter_conntrack.h:14:42: fatal error: libnfnetlink/linux_nfnetlink.h: No such file or directory
| compilation terminated.
| GNUmakefile:96: recipe for target 'libxt_connlabel.oo' failed
Only check libnetfilter-conntrack when libnfnetlink is enabled to fix it.
Signed-off-by: Kai Kang <kai.kang@windriver.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
