message: docs: add changelog for 6.0.0-rc.3
diff: +<a name="6.0.0-rc.3"></a>
  +# [6.0.0-rc.3](https://github.com/angular/angular/compare/6.0.0-rc.2...6.0.0-rc.3) (2018-04-06)
  +
  +
  +### Bug Fixes
  +
  +* **bazel:** don't produce ngfactory files for ng_packages ([#23237](https://github.com/angular/angular/issues/23237)) ([da58a55](https://github.com/angular/angular/commit/da58a55))
  +* **compiler-cli:** don't lower expressions in flat module metadata ([#23226](https://github.com/angular/angular/issues/23226)) ([11ea3a3](https://github.com/angular/angular/commit/11ea3a3))
  +
  +
  +
  <a name="6.0.0-rc.2"></a>
  # [6.0.0-rc.2](https://github.com/angular/angular/compare/6.0.0-rc.1...6.0.0-rc.2) (2018-04-05)
  