ipc:sysv:semaphore:semstat

Added sources for semstat
ipc:sysv:semaphore:semstat makefile

build the semstat program
ipc:sysv:semaphore:semstat binary

Tested all fine:

[hunter@FedoraCore16 ipc]$ ./semstat
Semaphore #0:  --> 0
Semaphore #1:  --> 1
Semaphore #2:  --> 1
Semaphore #3:  --> 0
Semaphore #4:  --> 1

of course, first the semaphore set was created by

./semtool c 5

then lock members 0 and 3,

./semtool l 0
./semtool l 3