synch targets: ensure wants relationship

Synchronization targets (i.e. targets that do not have services
underneath them) require "Wants" relationships to ensure they are
started and utilized. In most cases a service using them as a
synchronization target will ensure they are started but to be sure,
this should be explicitly defined within the targets themselves.

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: I053d1aba3f1596267a3ad3dbc6450f77df8a9396
diff --git a/target_files/obmc-host-stop-pre@.target b/target_files/obmc-host-stop-pre@.target
index 1ca4d55..8e9d5c0 100644
--- a/target_files/obmc-host-stop-pre@.target
+++ b/target_files/obmc-host-stop-pre@.target
@@ -1,6 +1,7 @@
 [Unit]
 Description=Stop Host%i (Pre)
 After=multi-user.target
+Wants=obmc-host-stopping@%i.target
 Before=obmc-host-stopping@%i.target
 Conflicts=obmc-host-startmin@%i.target
 RefuseManualStart=yes