message: Prepare changelog for v0.8.8-rc.2
diff: +Changes in [0.8.8-rc.2](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v0.8.8-rc.2) (2017-04-24)
  +=============================================================================================================
  +[Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v0.8.8-rc.1...v0.8.8-rc.2)
  +
  + * Fix bug where links to Riot would fail to open.
  +
  +
  Changes in [0.8.8-rc.1](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v0.8.8-rc.1) (2017-04-21)
  =============================================================================================================
  [Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v0.8.7...v0.8.8-rc.1)
  