[avr-gcc-list] Makefile problem with case of filenames.

[Jesper Hansen]

I just found a problem with the WinAVR/AVR-GCC suite when trying to make 
a project that had a few files with names in upper case.
On Windows, this may happen if the files come from an old system that 
did not support VFAT, or because the files were simply given names in 
upper case (and the name is within the 8.3 limits).

If names in upper case are used as targets (or rules), the link process 
will fail.

This should be considered a bug on the Windows version as the system is 
not supposed to be case sensitive.
Replacing all references in the Makefile to lowercase variants will 
allow make to pass (despite all names still being uppercase on the system).

So, there seems to be an "i" missing in some strcmp (or something) 
somewhere.


/Jesper