[LTP] [PATCH v3] doc: update syscalls statistics

[Petr Vorel]

Hi Andrea,

> This patch black-list a few syscalls which are not implemented in the
> kernel, untestable or either really old (=< 2.6 kernel version), as well
> as defining already tested syscalls.
> Also fixed an index issue with table generation.

Thanks a lot, obvious fix, therefore merged.

I would still consider:

1) Listing also mq_getsetattr().
2) Trying to links syscalls names to the syscalls directory
(e.g. read => read directory in LTP tree[1]) that should not be that hard.
3) Write explanation, that these syscalls are to "some extend tested".
Ideally, I would wish we would transform metadata output generation [2]
to the docs here and enable also LTP latest stable version docs.

Kind regards,
Petr

[1] https://github.com/linux-test-project/ltp/tree/master/testcases/kernel/syscalls/read
[2] https://github.com/linux-test-project/ltp/releases/download/20230516/metadata.20230516.html