api: update next.txt
api: update next.txt

Linux Flock_t, Unix FcntlFlock, and various BSD Termios.

R=golang-codereviews, dsymonds
CC=golang-codereviews
https://codereview.appspot.com/55460043

apparentlymart/golang,apparentlymart/golang,apparentlymart/golang,apparentlymart/golang,apparentlymart/golang,apparentlymart/golang,apparentlymart/golang