ash: fix unset in standalone mode

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/shell/ash_test/ash-standalone/var_standalone1.right b/shell/ash_test/ash-standalone/var_standalone1.right
new file mode 100644
index 0000000..37457fd
--- /dev/null
+++ b/shell/ash_test/ash-standalone/var_standalone1.right
@@ -0,0 +1 @@
+Done: 1