cpuset: Adapt sched_affinity compat shims to the stable/13

[dchagin]

Summary

Use compat shims to run the stable/13 world on a kernels which
does not support CPU_WHICH_TIDPID.

This is direct commit to the stable/13.

[kib]

lib/libc/gen/sched_getaffinity.c

44

I do not understand this condition.

IMO the right fix would be to add (*not replace*) a symbol like P_OSREL_TIDPID_13 to stable/13 branch, and the condition would be

if (__getosreldate() < P_OSREL_TIDPID_13 || (P_OSREL_MAJOR(__getosreldate()) == P_OSREL_MAJOR(P_OSREL_TIDPID) && __getosreldate() < P_OSREL_TIDPID)) {

[dchagin]

ok