message: docs: add changelog for 5.0.0-rc.5
diff: +<a name="5.0.0-rc.5"></a>
  +# [5.0.0-rc.5](https://github.com/angular/angular/compare/5.0.0-rc.4...5.0.0-rc.5) (2017-10-24)
  +
  +
  +### Bug Fixes
  +
  +* **compiler-cli:** report all diagnostic error messages ([#19886](https://github.com/angular/angular/issues/19886)) ([a82f863](https://github.com/angular/angular/commit/a82f863))
  +
  +
  +
  <a name="5.0.0-rc.4"></a>
  # [5.0.0-rc.4](https://github.com/angular/angular/compare/5.0.0-rc.3...5.0.0-rc.4) (2017-10-24)
  