debian: add missing netbase dependency
Apparently, some machines don't have this service (launchpad builders are one
such example). This adds the correct dependency for test-serve.t.
--- a/contrib/debian/control Sat Apr 16 14:24:25 2016 -0700
+++ b/contrib/debian/control Sun Apr 17 10:39:17 2016 -0700
@@ -5,6 +5,7 @@
Build-Depends:
debhelper (>= 7),
dh-python,
+ netbase,
python-all,
python-all-dev,
python-docutils,