Don't use non-portable diff --strip-trailing-cr.

Signed-off-by: Simon Josefsson <simon@josefsson.org>
diff --git a/tests/parser.sh b/tests/parser.sh
index 07448b6..eb885e5 100755
--- a/tests/parser.sh
+++ b/tests/parser.sh
@@ -32,7 +32,7 @@
 	exit 1
 fi
 
-diff --strip-trailing-cr ${TMPFILE} ${srcdir}/pkix.asn.out
+diff ${TMPFILE} ${srcdir}/pkix.asn.out
 
 if test $? != 0;then
 	echo "Generated C file differs!"