meta-phosphor: prep for new override syntax

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I588025b614416c43aa2d053765ab53bacf890cb5
diff --git a/meta-phosphor/recipes-extended/pam/pam-ipmi_git.bb b/meta-phosphor/recipes-extended/pam/pam-ipmi_git.bb
index 30bcf6a..a2bcb90 100644
--- a/meta-phosphor/recipes-extended/pam/pam-ipmi_git.bb
+++ b/meta-phosphor/recipes-extended/pam/pam-ipmi_git.bb
@@ -16,7 +16,7 @@
 DEPENDS += "autoconf-archive-native"
 DEPENDS += "openssl libpam"
 
-FILES_${PN} += " \
+FILES:${PN} += " \
                ${base_libdir}/security/ \
                ${sysconfdir}/key_file \
                ${sysconfdir}/ipmi_pass \