[LTP] [POSIX] V2: pthread_cond_signal/1-1: use sched_yield to sync threads

[Kang K. <kai...@wi...>]

Hi Cyril,

Version 2 update:
1 remove the set_affinity()
2 drop the use of sched_yield in loop waiting
3 don't remove the usleep(100) after add sched_yield when main thread release
  the condition variable.

Regards,
Kai