Use this tree forked from Jserv's tree

lab-1 and lab-2:
Use this tree forked from Jserv's tree instead of this tree
"https://github.com/AdrianHuang/ncku-arm-homework".

lab-3:
1) Added the random number generator
2) Added the gdb command in the file gdbscript
3) Replace the fibonacci function with another function (for example:
   factorial function) in gdb. This task is not completed yet. Still working
   on it.