Create steph_b_day_posix_asm.s

A very geeky, happy birthday message in intel assembly code using two posix threads, and global varible exchange between the main routine and the threads  (Yes, it is from using gcc -S -O2)

1.   Link with gcc (4.8+) : 
        gcc -o steph_b_day_posix_asm steph_b_day_posix_asm.s -lrt -lm -lpthread

2.   run:  
       ./steph_b_day_posix_asm

3.    After execution, at the command line type:
       echo $? 

4.  Change lines 72 and 74 as appropriate.  

DLW: 15 Sept  2014