Log message:
Add p5-Overload-FileCheck: Override/mock perl file check -X

Overload::FileCheck provides a way to mock one or more file checks. It
is also possible to mock stat/lstat functions using "mock_all_from_stat"
and let Overload::FileCheck mock for you for any other -X checks.

By using mock_all_file_checks you can set a hook function to reply
any -X check.