sched-host-tran: implement systemd service

Add service file to implement systemd service.

Change-Id: I6ccaad26d5fd6ad5ef6f39b901704835a9a918d3
Signed-off-by: Carol Wang <wangkair@cn.ibm.com>
diff --git a/service_files/meson.build b/service_files/meson.build
index 6284dab..18dfa47 100644
--- a/service_files/meson.build
+++ b/service_files/meson.build
@@ -8,7 +8,8 @@
     'phosphor-reset-sensor-states@.service',
     'xyz.openbmc_project.State.BMC.service',
     'xyz.openbmc_project.State.Chassis.service',
-    'xyz.openbmc_project.State.Host.service'
+    'xyz.openbmc_project.State.Host.service',
+    'xyz.openbmc_project.State.ScheduledHostTransition.service'
 ]
 
 foreach u : unit_files