- Remove mac_get_fd/mac_set_fd - those are not syscalls. The __mac_get_fd() and
  __mac_set_fd() syscalls are listed earlier.
- Correct typo in syscall name. It should be sched_rr_get_interval,
  not sched_rr_getinterval.

Submitted by:	David Drysdale <drysdale@google.com>
MFC after:	3 days