Update syscall lists for Linux 5.5

[Florian Weimer]

* Aurelien Jarno:

> On 2020-02-07 00:31, Joseph Myers wrote:
>> Linux 5.5 has no new syscalls to add to syscall-names.list, but it
>> does newly enable the clone3 syscall for AArch64.  This patch updates
>
> In practice clone3 has also been enabled in Linux 5.4.12. This cause the 
> misc/tst-glibcsyscalls test to fail when building glibc 2.31 with Linux
> kernel headers >= 5.4.12:
>
> original exit status 1
> error: kernel syscall 'clone3' (435) not known to glibc
> info: glibc tables are based on kernel version 5.4
> info: installed kernel headers are version 5.4
>
> Therefore should we backport this commit into the 2.31 stable branch?

Yes, we should.  Thanks.