[phobos] [D-Programming-Language/phobos] b44e3d: add missing file

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/D-Programming-Language/phobos
  Commit: b44e3dba6c92b5816e3d704b91de06f81aaf737f
      https://github.com/D-Programming-Language/phobos/commit/b44e3dba6c92b5816e3d704b91de06f81aaf737f
  Author: Walter Bright <walter at walterbright.com>
  Date:   2012-01-30 (Mon, 30 Jan 2012)

  Changed paths:
    M posix.mak

  Log Message:
  -----------
  add missing file