Create masterslave.c

1> master thread is main, which process 25 jobs. Until job count is less than 25, jobs are processed.
2> master takes lock and puts the jobAvail switch ON and sends conditional signal to slave. 
3> Following mutex is unlocked.
4> mutex lock is take in slave. 
5> slave thread also process all delegated 25 jobs until jobs are less than 25. 
5> if jobAvail is OFF, pthread_cont_wait is made in slave.
6> in slave if jobAvail is ON, some task is done. When task is complete jobAvail is made OFF.
7> finally mutex is unlocked in slave. The loop continues in slave and master untill all jobs are handled.