Software tarballs are downloaded even if not built

Some low-level software aren't necessary on some operating systems, for
example GCC can't be built on macOS, hence we don't build it and the
GCC-only dependencies. Also, on GNU/Linux systems users could configure
with '--host-cc' to avoid all the time it takes to build GCC when doing a
fast test.

Until now, in such cases not only was the software not installed, but the
tarballs of the software were also not downloaded. Hence making the output
of '--dist-software' incomplete (as in bug #58561).

With this commit, we now import all the necessary tarballs, when the
software isn't necessary for the particular system, it won't be built or
cited, but its tarball will be present anyway, thus allowing the output of
'--dist-software' to be complete.

0 files changed, 0 insertions, 0 deletions