ltlcross, autcross, ltldo: support --fail-on-timeout

Suggested by Tobias Meggendorfer.  Fixes #294.

* bin/autcross.cc, bin/ltlcross.cc, bin/ltldo.cc: Add the option.
* tests/core/autcross3.test, tests/core/ltlcross3.test,
tests/core/ltldo.test: Test it.
* tests/Makefile.am: Add autcross3.test.
* NEWS, doc/org/autcross.org, doc/org/ltlcross.org, doc/org/ltldo.org:
Mention the option.
* THANKS: Add Tobias.

tests/core/autcross3.test

@@ -0,0 +1,49 @@
+#!/bin/sh
+# -*- coding: utf-8 -*-
+# Copyright (C) 2017 Laboratoire de Recherche et Développement de
+# l'Epita (LRDE).
+#
+# This file is part of Spot, a model checking library.
+#
+# Spot is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# Spot is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+# License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# Test the timeout handling of autcross.
+. ./defs
+set -e
+
+check_csv()
+{
+  # Make sure all lines in $1 have the same number of comas
+  sed 's/[^,]//g' < "$1" |
+  ( read first
+  while read l; do
+    test "x$first" = "x$l" || exit 1
+  done)
+}
+
+randaut -Q4 2 |
+autcross --language-preserve 'autfilt' 'sleep 5; autfilt %H > %O' \
+  --timeout=2 --csv=out.csv 2>stderr
+cat stderr
+test `grep 'warning:.*timeout' stderr | wc -l` -eq 1
+test `wc -l < out.csv` -eq 3
+check_csv out.csv
+
+randaut -Q4 2 |
+autcross --language-preserve 'autfilt' 'sleep 5; autfilt %H > %O' \
+  --timeout=2 --fail-on-timeout --csv=out.csv 2>stderr && exit 1
+cat stderr
+test `grep 'error:.*timeout' stderr | wc -l` -eq 1
+test `wc -l < out.csv` -eq 3
+check_csv out.csv