strongswan: needs host-pkgconf

Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Tested-by: Jérôme Pouiller <jezz@sysmic.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/strongswan/strongswan.mk

@@ -9,6 +9,7 @@ STRONGSWAN_SOURCE = strongswan-$(STRONGSWAN_VERSION).tar.bz2
 STRONGSWAN_SITE = http://download.strongswan.org
 STRONGSWAN_LICENSE = GPLv2+
 STRONGSWAN_LICENSE_FILES = COPYING LICENSE
+STRONGSWAN_DEPENDENCIES = host-pkgconf
 STRONGSWAN_CONF_OPT +=                                                             \
       --enable-pkcs11=yes                                                          \
       --enable-kernel-netlink=$(if $(BR2_INET_IPV6),yes,no)                        \