[Bug other/78161] contrib/download_prerequisites fails on MacOS, Lubuntu, and Windows

[damian at sourceryinstitute dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78161

--- Comment #4 from Damian Rouson <damian at sourceryinstitute dot org> ---
I'll close this because another developer is going to work on it so my last
comment no longer applies.