service: Ensure starting when there's a ttyGS0 to write to

Also fix lintian sillyness.

Change-Id: Ia9aa5228b20f080f1fd1a720e91111134ba1964b

debian/lintian-overrides

diff --git a/debian/lintian-overrides b/debian/lintian-overrides
new file mode 100644
index 0000000..c344d3f
--- /dev/null
+++ b/debian/lintian-overrides
@@ -0,0 +1,3 @@
+vitalsd: init.d-script-not-included-in-package etc/init.d/vitalsd
+vitalsd: systemd-service-file-refers-to-unusual-wantedby-target lib/systemd/system/vitalsd.service basic.target
+

debian/vitalsd.service

diff --git a/debian/vitalsd.service b/debian/vitalsd.service
index d6f6fe3..ffcffdb 100644
--- a/debian/vitalsd.service
+++ b/debian/vitalsd.service
@@ -1,5 +1,6 @@
 [Unit]
 Description=vitalsd system vitality nurse
+After=usb-gadget
 
 [Service]
 Exec=/usr/bin/vitalsd /dev/tty/ttyGS0