Ensure host updater runs before mboxd

The host updater service generates the links to
the PNOR partition files, these are required
by mboxd

Resolves openbmc/openbmc#2051

Change-Id: I376d56dbce1be5fdbf97af870430d26e7b549117
Signed-off-by: Andrew Geissler <andrewg@us.ibm.com>
diff --git a/meta-openbmc-machines/meta-openpower/common/recipes-phosphor/flash/openpower-software-manager/org.open_power.Software.Host.Updater.service b/meta-openbmc-machines/meta-openpower/common/recipes-phosphor/flash/openpower-software-manager/org.open_power.Software.Host.Updater.service
index d0519da..dd3866c 100644
--- a/meta-openbmc-machines/meta-openpower/common/recipes-phosphor/flash/openpower-software-manager/org.open_power.Software.Host.Updater.service
+++ b/meta-openbmc-machines/meta-openpower/common/recipes-phosphor/flash/openpower-software-manager/org.open_power.Software.Host.Updater.service
@@ -2,6 +2,7 @@
 Description=OpenPower Software Update Manager
 Wants=xyz.openbmc_project.Software.Version.service
 Before=xyz.openbmc_project.Software.Version.service
+Before=mboxd.service
 
 [Service]
 ExecStart={sbindir}/openpower-update-manager