Fix tests build.

apps/db_dump/stubs.c

@@ -139,3 +139,10 @@ void db__msg_add_to_queued_stats(struct mosquitto_msg_data *msg_data, struct mos
 	UNUSED(msg_data);
 	UNUSED(msg);
 }
+
+int session_expiry__add_from_persistence(struct mosquitto *context, time_t expiry_time)
+{
+	UNUSED(context);
+	UNUSED(expiry_time);
+	return 0;
+}

test/unit/persist_read_stubs.c

@@ -205,3 +205,10 @@ void context__add_to_by_id(struct mosquitto *context)
 		HASH_ADD_KEYPTR(hh_id, db.contexts_by_id, context->id, strlen(context->id), context);
 	}
 }
+
+int session_expiry__add_from_persistence(struct mosquitto *context, time_t expiry_time)
+{
+	UNUSED(context);
+	UNUSED(expiry_time);
+	return 0;
+}

test/unit/persist_write_stubs.c

@@ -121,3 +121,10 @@ void context__add_to_by_id(struct mosquitto *context)
 		HASH_ADD_KEYPTR(hh_id, db.contexts_by_id, context->id, strlen(context->id), context);
 	}
 }
+
+int session_expiry__add_from_persistence(struct mosquitto *context, time_t expiry_time)
+{
+	UNUSED(context);
+	UNUSED(expiry_time);
+	return 0;
+}

test/unit/subs_stubs.c

@@ -219,3 +219,10 @@ void util__increment_send_quota(struct mosquitto *mosq)
 {
 	mosq->msgs_out.inflight_quota++;
 }
+
+int session_expiry__add_from_persistence(struct mosquitto *context, time_t expiry_time)
+{
+	UNUSED(context);
+	UNUSED(expiry_time);
+	return 0;
+}