shadow: update 4.13 -> 4.14.2

shadow: update 4.13 -> 4.14.2

License-Update: formatting, spdx conversion

Drop:
0001-Disable-use-of-syslog-for-sysroot.patch
(issue fixed upstream)

0001-Fix-can-not-print-full-login.patch
0001-Overhaul-valid_field.patch
CVE-2023-29383.patch
(backports)

libbsd is a new native dependency, as otherwise glibc >= 2.38
is needed.

A similar fix is added to musl in order to define non-standard __BEGIN_DECLS/__END_DECLS.

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>