phosphor-user-manager: Use systemd_unitdir

Change-Id: I80fbe83e15c2119b7f959a223919efc0ae4b4137
Signed-off-by: Anton Blanchard <anton@ozlabs.org>
diff --git a/meta-phosphor/recipes-phosphor/users/phosphor-user-manager_git.bb b/meta-phosphor/recipes-phosphor/users/phosphor-user-manager_git.bb
index 699bb3a..501d906 100644
--- a/meta-phosphor/recipes-phosphor/users/phosphor-user-manager_git.bb
+++ b/meta-phosphor/recipes-phosphor/users/phosphor-user-manager_git.bb
@@ -31,7 +31,7 @@
         ${bindir}/phosphor-ldap-conf \
 "
 FILES:${PN} += " \
-        ${base_libdir}/systemd \
+        ${systemd_unitdir} \
         ${datadir}/dbus-1 \
         ${datadir}/phosphor-certificate-manager \
 "