Update syscall lists for Linux 5.13

[Dmitry V. Levin]

On Wed, Jun 30, 2021 at 11:05:47PM +0000, Joseph Myers wrote:
> Linux 5.13 has three new syscalls (landlock_create_ruleset,
> landlock_add_rule, landlock_restrict_self).  Update syscall-names.list
> and regenerate the arch-syscall.h headers with build-many-glibcs.py
> update-syscalls.

Yes, this looks correct, these syscalls were wired up by Linux kernel
commit v5.13-rc1~71^2~5.


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