busybox: make busybox.links.{suid, nosuid} reproducible
The busybox.link.* files are generated from autoconf.h and applets.h,
which are both auto-generated by the build system. The contents of the
two files might be in different order, and so the link files are not
reproducble as is.
Fix this by sorting the lists using `sort`.
Signed-off-by: Martin Hundebøll <martin@geanix.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
