package/pkcs11-helper: needs host-pkgconf

pkg-config is used unconditionally in configure.ac to find dependencies
(openssl, gnutls and nss)

Fixes:
 - http://autobuild.buildroot.org/results/c01ae4f1a7babf94c841d4bb737408a9c8869845

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/pkcs11-helper/pkcs11-helper.mk

@@ -8,6 +8,7 @@ PKCS11_HELPER_VERSION = 1.26
 PKCS11_HELPER_SITE = $(call github,OpenSC,pkcs11-helper,pkcs11-helper-$(PKCS11_HELPER_VERSION))
 PKCS11_HELPER_LICENSE = GPL-2.0 or BSD-3-Clause
 PKCS11_HELPER_LICENSE_FILES = COPYING COPYING.BSD COPYING.GPL
+PKCS11_HELPER_DEPENDENCIES = host-pkgconf
 PKCS11_HELPER_AUTORECONF = YES
 PKCS11_HELPER_INSTALL_STAGING = YES