add a .gitignore file
-rw-r--r-- 52 .gitignore
-rw-r--r-- 18254 Makefile
drwxr-xr-x - build
drwxr-xr-x - contrib
drwxr-xr-x - doc
drwxr-xr-x - src
drwxr-xr-x - upstream