debian: add missing build deps

debian/control

@@ -4,9 +4,11 @@ Maintainer: CIP-Admins <problems@cip.cs.fau.de>
 Uploaders: Lukas Braun <no25qusu@stud.informatik.uni-erlangen.de>
 Build-Depends: debhelper (>= 9),
     libpam0g-dev,
+    golang-go,
     golang-github-lib-pq-dev,
     golang-github-gokyle-hotp-dev,
-    golang-github-mattn-go-sqlite3-dev
+    golang-github-mattn-go-sqlite3-dev,
+    postgresql
 Standards-Version: 3.9.8
 Section: admin
 Homepage: https://gitlab.cs.fau.de/koomi/goatherd