message: docs: add changelog for 5.0.1
diff: +<a name="5.0.1"></a>
  +## [5.0.1](https://github.com/angular/angular/compare/5.0.0...5.0.1) (2017-11-08)
  +
  +
  +### Bug Fixes
  +
  +* **compiler:** don't overwrite missingTranslation's value in JIT ([#19952](https://github.com/angular/angular/issues/19952)) ([799cbb9](https://github.com/angular/angular/commit/799cbb9))
  +* **compiler:** report a reasonable error with invalid metadata ([#20062](https://github.com/angular/angular/issues/20062)) ([da22c48](https://github.com/angular/angular/commit/da22c48))
  +* **compiler-cli:** don't report emit diagnostics when `--noEmitOnError` is off ([#20063](https://github.com/angular/angular/issues/20063)) ([8639995](https://github.com/angular/angular/commit/8639995))
  +* **core:** `__symbol__` should return `__zone_symbol__` without zone.js loaded ([#19541](https://github.com/angular/angular/issues/19541)) ([678d1cf](https://github.com/angular/angular/commit/678d1cf))
  +* **core:** should support event.stopImmediatePropagation ([#19222](https://github.com/angular/angular/issues/19222)) ([7083791](https://github.com/angular/angular/commit/7083791))
  +* **platform-browser:** support Symbols in custom `jasmineToString()` method ([#19794](https://github.com/angular/angular/issues/19794)) ([5a6efa7](https://github.com/angular/angular/commit/5a6efa7))
  +
  +
  <a name="5.0.0"></a>
  # [5.0.0](https://github.com/angular/angular/compare/5.0.0-rc.9...5.0.0) pentagonal-donut (2017-11-01)
  