package/ecryptfs-utils: add pkcs11-helper optional dependency

pkcs11-helper is an optional dependency which needs openssl

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
(cherry picked from commit f90061fc384d42805145e0c6cfa01de0afe48f31)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/ecryptfs-utils/ecryptfs-utils.mk

@@ -26,6 +26,14 @@ endif
 ifeq ($(BR2_PACKAGE_OPENSSL),y)
 ECRYPTFS_UTILS_CONF_OPTS += --enable-openssl
 ECRYPTFS_UTILS_DEPENDENCIES += openssl
+
+ifeq ($(BR2_PACKAGE_PKCS11_HELPER),y)
+ECRYPTFS_UTILS_CONF_OPTS += --enable-pkcs11-helper
+ECRYPTFS_UTILS_DEPENDENCIES += pkcs11-helper
+else
+ECRYPTFS_UTILS_CONF_OPTS += --disable-pkcs11-helper
+endif
+
 else
 ECRYPTFS_UTILS_CONF_OPTS += --disable-openssl
 endif