[Bug c/87488] hyperlink filenames in diagnostics

[dmalcolm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87488

--- Comment #15 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
I guess the other thing to test it on is on older gnome terminals that predate
the support - but I don't have one handy.