ash: add slightly different testcase

diff --git a/shell/ash_test/ash-signals/signal2.tests b/shell/ash_test/ash-signals/signal2.tests
index 04f981c..df639ca 100755
--- a/shell/ash_test/ash-signals/signal2.tests
+++ b/shell/ash_test/ash-signals/signal2.tests
@@ -6,7 +6,7 @@
     exit
 }
 trap cleanup HUP
-echo "sleeping"
+echo "child sleeps"
 sleep 1
 echo "BAD exit from child!"
 ' &