contrib/jenkins.sh: execute this script with -x and -e

-x  Print commands and their arguments as they are executed
  -e  Exit immediately if a command exits with a non-zero status

Change-Id: I13af70ef770936bec00b050b6c4f988e53ee2833

contrib/jenkins.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/sh -xe
 # jenkins build helper script for pysim.  This is how we build on jenkins.osmocom.org
 #
 # environment variables:
@@ -6,8 +6,6 @@
 # * PUBLISH: upload manuals after building if set to "1" (ignored without WITH_MANUALS = "1")
 #
 
-set -e
-
 if [ ! -d "./pysim-testdata/" ] ; then
 	echo "###############################################"
 	echo "Please call from pySim-prog top directory"