[Buffer Overflow] Stack Smash Fun

This is a simple example that I am committing to demonstrate the
dangers of buffer overflows. I am just skiping over some instructions
in this example. I had a lot of fun figuring out how to do this using
gdb to disassemble the source and also to inspect frames to figure
out where the local variables to function were placed on the stack.
Using this information I rewrite the saved eip on the stack frame
to point past the instruction that changes x to 1.

Pretty cool ish, after this is done I want to actually point the
saved eip to a place on the stack where I place some code of my
own.