Update syscall lists for Linux 5.10

[Dmitry V. Levin]

On Wed, Dec 16, 2020 at 01:53:37AM +0000, Joseph Myers wrote:
> Linux 5.10 has one new syscall, process_madvise.  Update
> syscall-names.list and regenerate the arch-syscall.h headers with
> build-many-glibcs.py update-syscalls.
> 
> Tested with build-many-glibcs.py.

Just for the reference, this new syscall was added by Linux commit
v5.10-rc1~87^2~14.

LGTM, thanks.


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