contrib/jenkins.sh: add 'distcheck' job to check package integrity

The idea of this new job is to catch package integrity problems,
like the missing entries in setup.py/packages[] or missing deps.

Change-Id: Ic72d58494e8fd0cab8d66ce60f7b70593b770872
Related: osmo-ci.git I9d4d9e9de2b16a4b745791f3c9c93507f43bfa6d
diff --git a/contrib/jenkins.sh b/contrib/jenkins.sh
index a5993da..6fb3d1a 100755
--- a/contrib/jenkins.sh
+++ b/contrib/jenkins.sh
@@ -4,7 +4,7 @@
 # environment variables:
 # * WITH_MANUALS: build manual PDFs if set to "1"
 # * PUBLISH: upload manuals after building if set to "1" (ignored without WITH_MANUALS = "1")
-# * JOB_TYPE: one of 'test', 'pylint', 'docs'
+# * JOB_TYPE: one of 'test', 'distcheck', 'pylint', 'docs'
 #
 
 export PYTHONUNBUFFERED=1
@@ -32,6 +32,17 @@
 	../tests/pySim-prog_test.sh
 	../tests/pySim-trace_test.sh
 	;;
+"distcheck")
+	virtualenv -p python3 venv --system-site-packages
+	. venv/bin/activate
+
+	pip install .
+	pip install pyshark
+
+	for prog in venv/bin/pySim-*.py; do
+		$prog --help > /dev/null
+	done
+	;;
 "pylint")
 	# Print pylint version
 	pip3 freeze | grep pylint