Added modifications inside the main Makefile to refers the unit test Makefile.
Added separated Makefile only for compiling unit tests.
Added simple example of unit test.
Signed-off-by: Charles Oliveira <18oliveira.charles@gmail.com>
Signed-off-by: Pablo Alejandro <pabloabur@usp.br>
Signed-off-by: Rodrigo Siqueira <siqueira@ime.usp.br>