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.tests b/shell/ash_test/ash-signals/signal5.tests
index 371120e..179bcdd 100755
--- a/shell/ash_test/ash-signals/signal5.tests
+++ b/shell/ash_test/ash-signals/signal5.tests
@@ -1,6 +1,6 @@
 trap "echo USR1 received" USR1
 stub() {
-    echo "sleeping for $1 sec"
+    echo "Sleeping"
     sleep $1
     echo "$1 sec passed, sending USR1 to parent"
     kill -USR1 $$