shell: syncronize ash and hush heredoc3.tests

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/shell/ash_test/ash-heredoc/heredoc9.tests b/shell/ash_test/ash-heredoc/heredoc9.tests
new file mode 100755
index 0000000..96c227c
--- /dev/null
+++ b/shell/ash_test/ash-heredoc/heredoc9.tests
@@ -0,0 +1,9 @@
+echo hello >greeting
+cat <<EOF &&
+$(cat greeting)
+EOF
+{
+	echo $?
+	cat greeting
+} >/dev/null
+rm greeting