[phobos] [D-Programming-Language/phobos] c6d1f7: Add missing imports

[GitHub via phobos]

  Branch: refs/heads/master
  Home:   https://github.com/D-Programming-Language/phobos
  Commit: c6d1f79b5b3233e13d04fe5fb4f7f0ffa19cda83
      https://github.com/D-Programming-Language/phobos/commit/c6d1f79b5b3233e13d04fe5fb4f7f0ffa19cda83
  Author: k-hara <k.hara.pg at gmail.com>
  Date:   2014-12-05 (Fri, 05 Dec 2014)

  Changed paths:
    M std/file.d

  Log Message:
  -----------
  Add missing imports


  Commit: e9eb01ba83a3864fdde62900a297391deb89d74c
      https://github.com/D-Programming-Language/phobos/commit/e9eb01ba83a3864fdde62900a297391deb89d74c
  Author: H. S. Teoh <hsteoh at quickfur.ath.cx>
  Date:   2014-12-04 (Thu, 04 Dec 2014)

  Changed paths:
    M std/file.d

  Log Message:
  -----------
  Merge pull request #2783 from 9rnsr/fix_imports

Add missing imports


Compare: https://github.com/D-Programming-Language/phobos/compare/9a46840c2b36...e9eb01ba83a3