Temporary release to check GH action

Add deb target to linux build (#1093)

Summary:
I'm adding the `.deb` option to linux build, it makes easier to install.
```bash
cd desktop
yarn build --linux --linux-deb
```

## Changelog

- Add deb target to linux build
Pull Request resolved: https://github.com/facebook/flipper/pull/1093

Reviewed By: mweststrate

Differential Revision: D21378807

Pulled By: passy

fbshipit-source-id: a72a85705d3c464cddd80091d38c92012bdbee2c