[phobos] [dlang/phobos] 859d5b: Increase time limit

[GitHub via phobos]

  Branch: refs/heads/timelimit
  Home:   https://github.com/dlang/phobos
  Commit: 859d5b408d325657a98165701096ad2e3546f4d3
      https://github.com/dlang/phobos/commit/859d5b408d325657a98165701096ad2e3546f4d3
  Author: Andrei Alexandrescu <andrei at erdani.com>
  Date:   2016-11-17 (Thu, 17 Nov 2016)

  Changed paths:
    M posix.mak

  Log Message:
  -----------
  Increase time limit

On some FreeBSD the unittest timeout with increased frequency, hence this change.