openssh: add backported security fix patches
Fixes a critical security bug allowing remote code execution as root:
<https://www.openssh.com/txt/release-9.8>
This may be CVE-2024-6387 (currently embargoed):
<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-6387>
Thanks to upstream and Sam James <sam@gentoo.org> for the backport:
<https://github.com/gentoo/gentoo/commit/1633ef45475afb9eea04e9cf27021c9d994af338>
