[Bug gcov-profile/94570] -fprofile-dir is broken on Cygwin

[10walls at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94570

--- Comment #8 from jon_y <10walls at gmail dot com> ---
I forgot to mention that while Cygwin runs on Windows, applications should
always use UNIX style paths.