meta-ibm: prep for new override syntax

Change-Id: I9116ed7260e369136acb39eec15075db2d4dbeba
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
diff --git a/meta-ibm/recipes-phosphor/dbus/ibm-dbus-interfaces-mapper-config-native.bb b/meta-ibm/recipes-phosphor/dbus/ibm-dbus-interfaces-mapper-config-native.bb
index b8489d6..14c1255 100644
--- a/meta-ibm/recipes-phosphor/dbus/ibm-dbus-interfaces-mapper-config-native.bb
+++ b/meta-ibm/recipes-phosphor/dbus/ibm-dbus-interfaces-mapper-config-native.bb
@@ -7,5 +7,5 @@
 inherit phosphor-mapper
 inherit native
 
-PHOSPHOR_MAPPER_SERVICE_append = " com.ibm"
-PHOSPHOR_MAPPER_INTERFACE_append = " com.ibm"
+PHOSPHOR_MAPPER_SERVICE:append = " com.ibm"
+PHOSPHOR_MAPPER_INTERFACE:append = " com.ibm"