work around BSD sed not interpreting \r in s/$/\r/

* src/kripketest/bad_parsing.test, src/tgbatest/neverclaimread.test,
src/tgbatest/readsave.test: Use Perl for the unix2dos conversion.

src/kripketest/bad_parsing.test

@@ -68,7 +68,7 @@ cat output | grep -v + > res
 diff expected res
 
 # The diagnostic should be the same with DOS return lines
-sed 's/$/\r/' input > input.dos
+perl -pe 's/$/\r/' input > input.dos
 mv input.dos input
 run 1 ../parse_print input 2> output
 cat output | grep -v + > res

src/tgbatest/neverclaimread.test

@@ -288,7 +288,7 @@ grep input: stderr > stderrfilt
 diff stderrfilt expected-err
 
 # DOS-style new lines should have the same output.
-sed 's/$/\r/g' input > input.dos
+perl -pe 's/$/\r/' input > input.dos
 mv input.dos input
 run 2 ../ltl2tgba -ks -XN input > stdout 2>stderr
 cat stderr

src/tgbatest/readsave.test

@@ -1,6 +1,6 @@
 #!/bin/sh
-# Copyright (C) 2009, 2010, 2012 Laboratoire de Recherche et Développement
-# de l'Epita (LRDE).
+# Copyright (C) 2009, 2010, 2012, 2014 Laboratoire de Recherche et
+# Développement de l'Epita (LRDE).
 # Copyright (C) 2003, 2004 Laboratoire d'Informatique de Paris 6 (LIP6),
 # département Systèmes Répartis Coopératifs (SRC), Université Pierre
 # et Marie Curie.
@@ -116,7 +116,7 @@ EOF
 diff stderrfilt expected
 
 # The diagnostic should be the same with DOS input
-sed 's/$/\r/' input > input.dos
+perl -pe 's/$/\r/' input > input.dos
 mv input.dos input
 run 2 ../ltl2tgba -b -X input > stdout 2>stderr
 cat stderr