fix architecture string for package name when explicitly specified on foreign architecture
add targets to list build-able packages for architecture
i.e.: want to know what target amd64-packages or arm64-packages would build?
run make amd64-pkglist or make arm64-pkglist
this is useful for automation and manual checks
i.e.: want to know what target
amd64-packagesorarm64-packageswould build? runmake amd64-pkglistormake arm64-pkglistthis is useful for automation and manual checks