Update kernel version in syscall-names.list to 4.13

[Florian Weimer]

On 09/04/2017 05:32 PM, Joseph Myers wrote:
> As far as I can tell Linux 4.13 does not add any new syscalls not
> included in syscall-names.list.  This patch updates the version number
> in that file accordingly.
> 
> 2017-09-04  Joseph Myers  <joseph@codesourcery.com>
> 
> 	* sysdeps/unix/sysv/linux/syscall-names.list: Update kernel
> 	version to 4.13.

I concur, I don't see any new system calls, either.

Thanks,
Florian