gevent: Add missing ordering dependency

The gevent wsgi server did not order itself after obmc-webserver-pre.

Resolves openbmc/openbmc#1204

Change-Id: I7e7cc4206e22ee8dfc3372c87ba2526f6ff8c412
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/common/recipes-phosphor/interfaces/phosphor-gevent/phosphor-gevent.service b/common/recipes-phosphor/interfaces/phosphor-gevent/phosphor-gevent.service
index e5dd707..2e13cfa 100644
--- a/common/recipes-phosphor/interfaces/phosphor-gevent/phosphor-gevent.service
+++ b/common/recipes-phosphor/interfaces/phosphor-gevent/phosphor-gevent.service
@@ -2,6 +2,7 @@
 Description=Phosphor Webserver
 PartOf=systemd-networkd.service
 After=phosphor-gevent.socket
+After=obmc-webserver-pre.target
 
 [Service]
 Restart=always