phosphor-ipmi-host: Units can depend on xyz.openbmc_project.Control.Host

Expose an alias so if other units depend on the DBus presence of ipmid
they can explicitly depend on it.

Change-Id: If9e4c09e1183bdd2b0d82a7b4a7f5cfb8dba7add
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/recipes-phosphor/ipmi/phosphor-ipmi-host/phosphor-ipmi-host.service b/recipes-phosphor/ipmi/phosphor-ipmi-host/phosphor-ipmi-host.service
index 8beb732..62687d6 100644
--- a/recipes-phosphor/ipmi/phosphor-ipmi-host/phosphor-ipmi-host.service
+++ b/recipes-phosphor/ipmi/phosphor-ipmi-host/phosphor-ipmi-host.service
@@ -26,3 +26,4 @@
 
 [Install]
 WantedBy=multi-user.target
+Alias=xyz.openbmc_project.Control.Host.service