systemd: BMC error for multi-user.target fails

This error will logged when the multi-user.target has an error status
upon completion

Change-Id: Iab9317921549320bfe0fea4a3dc3646d09930ef9
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/xyz/openbmc_project/State/SystemdTarget.errors.yaml b/xyz/openbmc_project/State/SystemdTarget.errors.yaml
new file mode 100644
index 0000000..e48f590
--- /dev/null
+++ b/xyz/openbmc_project/State/SystemdTarget.errors.yaml
@@ -0,0 +1,3 @@
+# xyz.openbmc_project.State.SystemdTarget.Error.Failure
+- name: Failure
+  description: A systemd target has failed