Fix DBus proxies to use all definitions

Bug: 22608897
Change-Id: Id17cf4b896c1c62be874599c7f346f3045e36819
diff --git a/core/definitions.mk b/core/definitions.mk
index 9865d99..36bb0d4 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -990,7 +990,7 @@
 $(hide) $(DBUS_GENERATOR) \
 	--service-config=$(PRIVATE_DBUS_SERVICE_CONFIG) \
 	--proxy=$@ \
-	$<
+	$(filter %.dbus.xml,$^)
 endef