Initially I added logic that checked if excluded path was a file
we would accept. This works for source files, but when file with
"unknown" extension was given it was determined as a directory
name and ending slash was added. E.g. -ifile.h would end up
having ignored path file.h/.
This commit adds per-platform checks if the path points to the
file and if the file also exists.
Kimmo Varis
Greg Hewgill
Daniel Marjamäki
Kimmo Varis