[phobos] [dlang/phobos] fce74f: update changelog for 2.072

[GitHub via phobos]

  Branch: refs/heads/master
  Home:   https://github.com/dlang/phobos
  Commit: fce74f30066f2f409e45d38b6a871e2777e15068
      https://github.com/dlang/phobos/commit/fce74f30066f2f409e45d38b6a871e2777e15068
  Author: Ilya Yaroshenko <ilyayaroshenko at gmail.com>
  Date:   2016-05-01 (Sun, 01 May 2016)

  Changed paths:
    M changelog.dd

  Log Message:
  -----------
  update changelog for 2.072


  Commit: 85749d5865af224eec5fd1f530e2aee9347378f7
      https://github.com/dlang/phobos/commit/85749d5865af224eec5fd1f530e2aee9347378f7
  Author: Dmitry Olshansky <dmitry.olsh at gmail.com>
  Date:   2016-05-01 (Sun, 01 May 2016)

  Changed paths:
    M changelog.dd

  Log Message:
  -----------
  Merge pull request #4262 from 9il/chl2

update changelog for 2.072


Compare: https://github.com/dlang/phobos/compare/1e9fdc08f5da...85749d5865af