package/bind: add json-c optional dependency

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
(cherry picked from commit fbdcd55134)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/bind/bind.mk

@@ -33,7 +33,6 @@ BIND_CONF_ENV = \
 BIND_CONF_OPTS = \
 	--without-cmocka \
 	--without-lmdb \
-	--with-json-c=no \
 	--enable-epoll \
 	--disable-backtrace \
 	--with-openssl=$(STAGING_DIR)/usr
@@ -47,6 +46,13 @@ else
 BIND_CONF_OPTS += --without-zlib
 endif
 
+ifeq ($(BR2_PACKAGE_JSON_C),y)
+BIND_CONF_OPTS += --with-json-c
+BIND_DEPENDENCIES += json-c
+else
+BIND_CONF_OPTS += --without-json-c
+endif
+
 ifeq ($(BR2_PACKAGE_LIBCAP),y)
 BIND_CONF_OPTS += --enable-linux-caps
 BIND_DEPENDENCIES += libcap