package/nbd: add host-pkgconf to dependencies

pkg-config is used to find libglib2 since version 3.17 and
https://github.com/NetworkBlockDevice/nbd/commit/ef86bbd9da2e2116ec0da6f9c130fb52e89fc310

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Acked-by: Yann E. MORIN <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit d630ed2dcf1fcb11c93f8ae363e4fd85c7ba8a4a)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/nbd/nbd.mk

@@ -8,7 +8,7 @@ NBD_VERSION = 3.19
 NBD_SOURCE = nbd-$(NBD_VERSION).tar.xz
 NBD_SITE = http://downloads.sourceforge.net/project/nbd/nbd/$(NBD_VERSION)
 NBD_CONF_OPTS = --enable-lfs
-NBD_DEPENDENCIES = libglib2
+NBD_DEPENDENCIES = host-pkgconf libglib2
 NBD_LICENSE = GPL-2.0
 NBD_LICENSE_FILES = COPYING