The current implementation of open requires the user to pass all three
args to the function. It should use a va_list and allow a user to
provide only the filename and flags.
- Add cfg to extern crate sc. It is not used by redox.
- Fix bad syntax in brk implementation for redox
- nits
- style: update brk implementation for linux
- style: no space between not operator and ptr.is_null
- style: should be a space around = in module path