lintian: Add explicit source format and fix dependencies

Change-Id: I4c8b74dce4fb235524d30d3e14676b50bbd9960d

debian/control

diff --git a/debian/control b/debian/control
index 62cbf82..ff92894 100644
--- a/debian/control
+++ b/debian/control
@@ -1,6 +1,6 @@
 Source: runonce
 Maintainer: Coral <coral-support@google.com>
-Build-Depends: debhelper (>=10), dh-systemd
+Build-Depends: debhelper (>=10)
 Section: misc
 Priority: optional
 Standards-Version: 3.9.8

debian/lintian-overrides

diff --git a/debian/lintian-overrides b/debian/lintian-overrides
new file mode 100644
index 0000000..1a7a1ae
--- /dev/null
+++ b/debian/lintian-overrides
@@ -0,0 +1,2 @@
+runonce: systemd-service-file-refers-to-unusual-wantedby-target lib/systemd/system/runonce.service basic.target
+

debian/source/format

diff --git a/debian/source/format b/debian/source/format
new file mode 100644
index 0000000..d3827e7
--- /dev/null
+++ b/debian/source/format
@@ -0,0 +1 @@
+1.0