updatesymlinks: Add instantiated mbox service

The Before directive had the template service mboxd-reload@.service
but because it wasn't instantiated, the dependency was not taking
place and the mboxd-reset service would not wait for the
updatesymlinks service to finish, causing the host to read old data
until the updatesymlinks completed.

Resolves openbmc/openbmc#2695

Change-Id: I3669155f1c287d5f492f3400ab9d131913a2a93f
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
1 file changed