Possible bug in FAT dir listing

[Chris Johns]

Gene Smith wrote:
> 
> This also explains why a volume label shows up as a file in rtems when 
> doing ls. It should be ignored too.
> 

The issue was different.

> AFAICT, there is no code in the rtems FAT library to ignore files when 
> these attribute flags are set. I only see the "directory" attribute 
> checked in some places.

I have added the code to fix this and will check it in sometime in the future 
when other changes I have are working.

Regards
Chris