gitignore: ignore nit_compile folders and contents
gitignore: ignore nit_compile folders and contents

nit_compile are a series of generated intermediate C files that should
not be versioned.

We therefore add them to the .gitignore to eliminate them from the
index.

Signed-off-by: Lucas Bajolet <7ee927989f658093d1603ebdd77063d48a82a2fc@gmail.com>

privat/nit,privat/nit,privat/nit,privat/nit,privat/nit,privat/nit,privat/nit,privat/nit,privat/nit,privat/nit