Adding service file

Service file for swampd has been added

Signed-off-by: Vijay Khemka <vijaykhemka@fb.com>
Change-Id: If449c0e943f1a82e9d18599391f0dc68c28009ec
diff --git a/phosphor-pid-control.service.in b/phosphor-pid-control.service.in
new file mode 100644
index 0000000..aa29377
--- /dev/null
+++ b/phosphor-pid-control.service.in
@@ -0,0 +1,12 @@
+[Unit]
+Description=Phosphor-Pid-Control Margin-based Fan Control Daemon
+
+[Service]
+Restart=always
+ExecStart={bindir}/swampd
+RestartSec=5
+StartLimitInterval=0
+Type=simple
+
+[Install]
+WantedBy=@SYSTEMD_TARGET@