reproducible Archlinux: dont fail the job if diffoscope --version fails

Signed-off-by: Holger Levsen <holger@layer-acht.org>

bin/reproducible_build_archlinux_pkg.sh

@@ -438,13 +438,13 @@ if [ ! -z "$(ls $TMPDIR/b1/$SRCPACKAGE/*.pkg.tar.xz 2>/dev/null|| true)" ] ; the
 				echo "</p></body>"
 			) > "$BASE/archlinux/$REPOSITORY/$SRCPACKAGE/$ARTIFACT.html"
 		elif [ -f $TMPDIR/b1/$SRCPACKAGE/$ARTIFACT ] && [ -f $TMPDIR/b2/$SRCPACKAGE/$ARTIFACT ] ; then
-			echo "$(date -u) - running diffoscope on the results"
+			echo "$(date -u) - running diffoscope on the results now:"
 			TIMEOUT="60m"
-			DIFFOSCOPE="$(schroot --directory /tmp -c chroot:jenkins-reproducible-${DBDSUITE}-diffoscope diffoscope -- --version 2>&1)"
+			DIFFOSCOPE="$(schroot --directory /tmp -c chroot:jenkins-reproducible-${DBDSUITE}-diffoscope diffoscope -- --version 2>&1 || echo 'diffoscope-unknown-version')"
 			echo "$(date -u) - Running $DIFFOSCOPE now..."
 			call_diffoscope $SRCPACKAGE $ARTIFACT
 		elif [ -f $TMPDIR/b1/$SRCPACKAGE/$ARTIFACT ] || [ -f $TMPDIR/b2/$SRCPACKAGE/$ARTIFACT ] ; then
-			echo "$(date -u) - one of the two builds failed... delete the other one"
+			echo "$(date -u) - one of the two builds failed... delete the other one:"
 			( rm $TMPDIR/b1/$SRCPACKAGE/$ARTIFACT || rm $TMPDIR/b1/$SRCPACKAGE/$ARTIFACT ) 2>/dev/null
 		else
 			# some packages define the package version based on the build date