nofib tests fail on Windows due to different EOL convention in output files
Fixed in 307ae61121a99f6ffd3d5fa56e5d37b1b91a492b
This allows nofib to run on Windows using `msys`.
Also deprecates the old `cygwin` stuff.
Test Plan: make clean && make
Reviewers: bgamari
Reviewed By: bgamari
Subscribers: RyanGlScott, #ghc_windows_task_force
Differential Revision: https://phabricator.haskell.org/D3030