two proposed linuxulator fixes + ptrace

[Konstantin Belousov]

On Fri, Jun 15, 2018 at 10:23:06AM +0300, Yanko Yankulov wrote:
> Thanks for the hint. It turned that we already have all the info due to the
> call to  fill_kinfo_proc(p, &kp);
> 
> Proper patch attached. Verified with the ptrace patch, that correct values
> are reported in PPid & TracerPid.
Patch looks good, I will commit it later today.  Thank you.