[Bug gcov-profile/87442] Add options to filter files we want to instrument for code coverage

[cdenizet at mozilla dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87442

--- Comment #5 from calixte <cdenizet at mozilla dot com> ---
@martin, @honza: about option names, do we have an agreement on
-fprofile-filter-files and -fprofile-exclude-files ?