Update syscall lists for Linux 5.5

[Siddhesh Poyarekar]

On 07/02/20 06:01, 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
> the kernel version listed in syscall-names.list and regenerates the
> AArch64 arch-syscall.h.
> 
> Tested with build-many-glibcs.py.
> 

LGTM.

Siddhesh