package/ecryptfs-utils: add host-pkgconf dependency

Add host-pkgconf dependency to fix the following build failure (e.g. with
BR2_PER_PACKAGE_DIRECTORIES):

configure: error: OpenSSL not found

As a side-effect, NSS_{CFLAGS,LIBS} can be dropped

Fixes:
 - http://autobuild.buildroot.org/results/ea16957e8f048b713f5d2713aa5f0c157b62f574

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/ecryptfs-utils/ecryptfs-utils.mk

@@ -11,14 +11,10 @@ ECRYPTFS_UTILS_LICENSE = GPL-2.0+
 ECRYPTFS_UTILS_LICENSE_FILES = COPYING
 ECRYPTFS_UTILS_CPE_ID_VENDOR = ecryptfs
 
-ECRYPTFS_UTILS_DEPENDENCIES = keyutils libnss host-intltool
+ECRYPTFS_UTILS_DEPENDENCIES = host-pkgconf keyutils libnss host-intltool
 ECRYPTFS_UTILS_CONF_OPTS = --disable-pywrap
 
-#Needed for build system to find pk11func.h and libnss3.so
-ECRYPTFS_UTILS_CONF_ENV = \
-	ac_cv_path_POD2MAN=true \
-	NSS_CFLAGS="-I$(STAGING_DIR)/usr/include/nss -I$(STAGING_DIR)/usr/include/nspr" \
-	NSS_LIBS="-lnss3"
+ECRYPTFS_UTILS_CONF_ENV = ac_cv_path_POD2MAN=true
 
 ifeq ($(BR2_PACKAGE_LINUX_PAM),y)
 ECRYPTFS_UTILS_CONF_OPTS += --enable-pam