message: docs: add changelog for 5.0.0-rc.8
diff: +<a name="5.0.0-rc.8"></a>
  +# [5.0.0-rc.8](https://github.com/angular/angular/compare/5.0.0-rc.7...5.0.0-rc.8) (2017-10-28)
  +
  +
  +### Bug Fixes
  +
  +* **compiler-cli:** avoid producing source mappings for host views ([#19965](https://github.com/angular/angular/issues/19965)) ([2d508a3](https://github.com/angular/angular/commit/2d508a3))
  +* **platform-server:** add missing packages to the UMD global rollup config ([4285b6c](https://github.com/angular/angular/commit/4285b6c))
  +
  +
  +
  <a name="5.0.0-rc.7"></a>
  # [5.0.0-rc.7](https://github.com/angular/angular/compare/5.0.0-rc.6...5.0.0-rc.7) (2017-10-27)
  