meta-phosphor: prep for new override syntax

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I588025b614416c43aa2d053765ab53bacf890cb5
diff --git a/meta-phosphor/recipes-phosphor/dbus/phosphor-dbus-interfaces-mapper-config-native.bb b/meta-phosphor/recipes-phosphor/dbus/phosphor-dbus-interfaces-mapper-config-native.bb
index 3dfc3b1..dda33fa 100644
--- a/meta-phosphor/recipes-phosphor/dbus/phosphor-dbus-interfaces-mapper-config-native.bb
+++ b/meta-phosphor/recipes-phosphor/dbus/phosphor-dbus-interfaces-mapper-config-native.bb
@@ -9,5 +9,5 @@
 inherit phosphor-mapper
 inherit native
 
-PHOSPHOR_MAPPER_SERVICE_append = " xyz.openbmc_project"
-PHOSPHOR_MAPPER_INTERFACE_append = " xyz.openbmc_project org.freedesktop.DBus.ObjectManager"
+PHOSPHOR_MAPPER_SERVICE:append = " xyz.openbmc_project"
+PHOSPHOR_MAPPER_INTERFACE:append = " xyz.openbmc_project org.freedesktop.DBus.ObjectManager"