Fixed missing starting slash in tests

Fixed two missing slashes to avoid having messages like:

```
+ /incshopdisplayproducts.asp?id=1&cat=<script>alert(document.cookie)</script>: PHP include error may indicate local or remote file inclusion is possible.
+ /incfi?/etc/passwd: PHP include error may indicate local or remote file inclusion is possible.
```

when scanning a subdir "/inc".