ash testsuite: remove two more inadvertent bashisms

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/shell/ash_test/ash-redir/redir8.tests b/shell/ash_test/ash-redir/redir8.tests
index 8cb42c0..2bd3867 100755
--- a/shell/ash_test/ash-redir/redir8.tests
+++ b/shell/ash_test/ash-redir/redir8.tests
@@ -6,10 +6,10 @@
 # Subcase when redirect filename is specified in a variable.
 
 >unicode.sh
-echo -e 'v=uni\x81code' >>unicode.sh
-echo -e 'echo Ok >"$v"' >>unicode.sh
-echo -e 'cat uni\x81code' >>unicode.sh
-echo -e 'cat uni?code' >>unicode.sh
+printf 'v=uni\x81code\n' >>unicode.sh
+printf 'echo Ok >"$v"\n' >>unicode.sh
+printf 'cat uni\x81code\n' >>unicode.sh
+printf 'cat uni?code\n' >>unicode.sh
 . ./unicode.sh
 rm uni*code*
 echo Done