package_manager.py: Generate separate repo entries per arch
dnf requires a serparate repo for each architecture. This patch
writes one config file per PACKAGE_FEED_URIS entry with an entry
for each architecture, if any.
It also uses a space separated version of the repo id as the repo
name instead of just the id again.
Signed-off-by: Ian.Arkver <ian.arkver.dev@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
