arch: Wire up Landlock syscalls

mainline inclusion
from mainline-v5.13-rc1
commit a49f4f81
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I6DJU0
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a49f4f81cb48925e8d7cbd9e59068f516e984144



--------------------------------

Wire up the following system calls for all architectures:
* landlock_create_ruleset(2)
* landlock_add_rule(2)
* landlock_restrict_self(2)

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: James Morris <jmorris@namei.org>
Cc: Jann Horn <jannh@google.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Serge E. Hallyn <serge@hallyn.com>
Signed-off-by: Mickaël Salaün <mic@linux.microsoft.com>
Link: https://lore.kernel.org/r/20210422154123.13086-10-mic@digikod.net


Signed-off-by: James Morris <jamorris@linux.microsoft.com>

conflicts:
	arch/alpha/kernel/syscalls/syscall.tbl
	arch/arm/tools/syscall.tbl
	arch/arm64/include/asm/unistd32.h
	arch/ia64/kernel/syscalls/syscall.tbl
	arch/m68k/kernel/syscalls/syscall.tbl
	arch/microblaze/kernel/syscalls/syscall.tbl
	arch/mips/kernel/syscalls/syscall_n32.tbl
	arch/mips/kernel/syscalls/syscall_n64.tbl
	arch/mips/kernel/syscalls/syscall_o32.tbl
	arch/parisc/kernel/syscalls/syscall.tbl
	arch/powerpc/kernel/syscalls/syscall.tbl
	arch/s390/kernel/syscalls/syscall.tbl
	arch/sh/kernel/syscalls/syscall.tbl
	arch/sparc/kernel/syscalls/syscall.tbl
	arch/x86/entry/syscalls/syscall_32.tbl
	arch/x86/entry/syscalls/syscall_64.tbl
	arch/xtensa/kernel/syscalls/syscall.tbl
	include/uapi/asm-generic/unistd.h

Signed-off-by: Yi Yang <yiyang13@huawei.com>