ash: fix redirection of fd 0 in scripts are sourced from interactive ash

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/shell/ash_test/ash-signals/signal5.right b/shell/ash_test/ash-signals/signal5.right
index 162f56b..7cfd411 100644
--- a/shell/ash_test/ash-signals/signal5.right
+++ b/shell/ash_test/ash-signals/signal5.right
@@ -1,5 +1,5 @@
-sleeping for 3 sec
-sleeping for 2 sec
+Sleeping
+Sleeping
 Waiting
 2 sec passed, sending USR1 to parent
 USR1 received