Fix test expectation now that -a doesn't work without readline

Follow-up upon 959e578

Author: Girgias

Zend/tests/bug40236.phpt

@@ -10,7 +10,5 @@ $php = getenv('TEST_PHP_EXECUTABLE');
 $cmd = "\"$php\" -n -d memory_limit=4M -a \"".__DIR__."\"/bug40236.inc";
 echo `$cmd`;
 ?>
---EXPECTF--
-Interactive %s
-
-ok
+--EXPECT--
+Interactive shell (-a) requires the readline extension.