meta-ibm: prep for new override syntax

Change-Id: I9116ed7260e369136acb39eec15075db2d4dbeba
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
diff --git a/meta-ibm/meta-romulus/recipes-phosphor/skeleton/obmc-libobmc-intf_%.bbappend b/meta-ibm/meta-romulus/recipes-phosphor/skeleton/obmc-libobmc-intf_%.bbappend
index 4db6f3a..451d820 100644
--- a/meta-ibm/meta-romulus/recipes-phosphor/skeleton/obmc-libobmc-intf_%.bbappend
+++ b/meta-ibm/meta-romulus/recipes-phosphor/skeleton/obmc-libobmc-intf_%.bbappend
@@ -1 +1 @@
-FILESEXTRAPATHS_prepend_romulus := "${THISDIR}/${PN}:"
+FILESEXTRAPATHS:prepend:romulus := "${THISDIR}/${PN}:"