Sync NBSD libc errno.h with minix errno.h

Sync NBSD libc errno.h with minix errno.h

This patch fixes some wrong error code number in nbsd libc's sys/errno.h
and adds new ones.

As in NetBSD the errno.h is used to automatically generate errlist.c array,
EBADCPU set to 1000 to be a bit too large, so we instruct the awk script
to stop at EDEADEPT (ELAST).