meta-google: gbmc-bridge: Run service when DHCP completes

This makes it possible for our installation service to determine when
the BMC is ready to continue after DHCP.

Change-Id: I62f31c39a9d5849d18f81ab58c88e9e5ef4b9737
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/meta-google/recipes-google/networking/gbmc-bridge/gbmc-br-dhcp.sh b/meta-google/recipes-google/networking/gbmc-bridge/gbmc-br-dhcp.sh
index e2701d4..1a6c71a 100644
--- a/meta-google/recipes-google/networking/gbmc-bridge/gbmc-br-dhcp.sh
+++ b/meta-google/recipes-google/networking/gbmc-bridge/gbmc-br-dhcp.sh
@@ -98,4 +98,8 @@
   fi
 
   gbmc_br_dhcp_run_hooks || exit
+
+  # Ensure that the installer knows we have completed processing DHCP by
+  # running a service that reports completion
+  systemctl start dhcp-done --no-block
 fi