message: docs: add changelog for 4.0.2
diff: +<a name="4.0.2"></a>
  +## [4.0.2](https://github.com/angular/angular/compare/4.0.1...4.0.2) (2017-04-11)
  +
  +
  +### Bug Fixes
  +
  +* **compiler:** fix inheritance for AOT with summaries ([#15583](https://github.com/angular/angular/issues/15583)) ([1864ccb](https://github.com/angular/angular/commit/1864ccb))
  +* **language-service:** avoid throwing exceptions when reporting metadata errors ([0861fda](https://github.com/angular/angular/commit/0861fda))
  +* **language-service:** detect when there isn't a tsconfig.json ([168a2eb](https://github.com/angular/angular/commit/168a2eb)), closes [#15874](https://github.com/angular/angular/issues/15874)
  +* **language-service:** improve resilience to incomplete information ([e4277a0](https://github.com/angular/angular/commit/e4277a0))
  +* **language-service:** initialize static reflector correctly ([5b99533](https://github.com/angular/angular/commit/5b99533)), closes [#15768](https://github.com/angular/angular/issues/15768)
  +* **language-service:** parse extended i18n forms ([c9c7acd](https://github.com/angular/angular/commit/c9c7acd))
  +* **language-service:** resolve any parameter types to any result ([feae7b6](https://github.com/angular/angular/commit/feae7b6))
  +* **router:** fix query param parsing ([2f41b52](https://github.com/angular/angular/commit/2f41b52))
  +* **router:** the preloader use the module from the loaded config ([978f809](https://github.com/angular/angular/commit/978f809))
  +* **tsc-wrapped:** ensure valid path separators in metadata ([c10e50c](https://github.com/angular/angular/commit/c10e50c))
  +
  +
  +
  <a name="4.1.0-beta.0"></a>
  # [4.1.0-beta.0](https://github.com/angular/angular/compare/4.0.0...4.1.0-beta.0) (2017-03-29)
  