Add new google ipmi sys command: SysHostPowerOff

New google ipmi sys command to let the BMC knows host shutdown,
allow host to gracefully shutdown and disable the watchdog with given
time delay.

Signed-off-by: Yunyun Lin <linyuny@google.com>
Change-Id: I02171c9cfed57ae5d10d66b515e4ab7ee8856466
diff --git a/gbmc-host-poweroff.target b/gbmc-host-poweroff.target
new file mode 100644
index 0000000..521e840
--- /dev/null
+++ b/gbmc-host-poweroff.target
@@ -0,0 +1,2 @@
+[Unit]
+Description=Sys Host Power Off