Add .gitignore file to avoid the noisy
tree961b9459c2acb992096cd9d915a862a948aa2d09
-rw-r--r-- 26 .gitignore
-rw-r--r-- 1024 Makefile
-rw-r--r-- 928 README
-rwxr-xr-x 1763 bochsrc
drwxr-xr-x - boot
drwxr-xr-x - doc
drwxr-xr-x - fs
drwxr-xr-x - image
drwxr-xr-x - include
drwxr-xr-x - init
drwxr-xr-x - kernel
drwxr-xr-x - mm