Add 7-segment display daemon

This daemon takes the path of a 7-segment display device node as its
argument and then writes POST codes which were received over D-Bus to
that device.

Signed-off-by: Benjamin Fair <benjaminfair@google.com>
Change-Id: Ic00548c3ebb5a7aa3c9a927c2de748595eb90e71
diff --git a/postcode-7seg@.service b/postcode-7seg@.service
new file mode 100644
index 0000000..a4c5aa0
--- /dev/null
+++ b/postcode-7seg@.service
@@ -0,0 +1,12 @@
+[Unit]
+Description=SevenSeg POSTcode daemon for /dev/%I
+After=dev-%i.device
+After=lpcsnoop.service
+
+[Service]
+Type=simple
+Restart=always
+ExecStart=/usr/bin/env postcode_7seg /dev/%I
+
+[Install]
+WantedBy=multi-user.target