Don't enable the opt to dump bin to terminal

The -f option is actually overwritten by the -o option.
Simplify the rec-calls test to fibonacci

I know that the Fibonacci problem can be solved by very smart algorithms
which avoid the recursive function calls. This is just a unit test for
giri.
Fix a bug of passing arguments to test exes

It seems that the "echo $(INPUT) | ./$(NAME).exe" method is not quite
right. Why not simply run the exe with the INPUT appened?