[Bug driver/80271] Support environment variable CLICOLOR_FORCE to enable -fdiagnostics-color

[egallager at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80271

--- Comment #7 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Adam Borowski from comment #6)
> Created attachment 44260 [details]
> patch for CLICOLOR_FORCE
> 
> So, here's a patch.

Please send patches to the gcc-patches mailing list for review.