shell: syncronize ash and hush heredoc1.tests

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/shell/ash_test/ash-heredoc/heredoc8.right b/shell/ash_test/ash-heredoc/heredoc8.right
new file mode 100644
index 0000000..af39666
--- /dev/null
+++ b/shell/ash_test/ash-heredoc/heredoc8.right
@@ -0,0 +1 @@
+./heredoc8.tests: line 3: syntax error: unexpected "then"