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

[marxin at gcc dot gnu.org]

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

--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
Good then, maybe I'll do that in next weeks. It should not be so difficult from
implementation point of view.