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-legacy-namespace-mapper-config-native.bb b/meta-phosphor/recipes-phosphor/dbus/phosphor-legacy-namespace-mapper-config-native.bb
index c923512..2682ba3 100644
--- a/meta-phosphor/recipes-phosphor/dbus/phosphor-legacy-namespace-mapper-config-native.bb
+++ b/meta-phosphor/recipes-phosphor/dbus/phosphor-legacy-namespace-mapper-config-native.bb
@@ -8,5 +8,5 @@
 inherit phosphor-mapper
 inherit native
 
-PHOSPHOR_MAPPER_SERVICE_append = " org.openbmc"
-PHOSPHOR_MAPPER_INTERFACE_append = " org.openbmc"
+PHOSPHOR_MAPPER_SERVICE:append = " org.openbmc"
+PHOSPHOR_MAPPER_INTERFACE:append = " org.openbmc"