d/patches: backport improvements to the `sort` command

The post-installation script of at least one packages makes use of the
`-k` option for `sort`, which isn't implemented in release 0.0.6 of
`rust-coreutils`.

As this has since been implemented upstream, this commit picks the
corresponding patches so we can benefit of those improvements.

Signed-off-by: Arnaud Ferraris <arnaud.ferraris@collabora.com>