needed to add some service from CORE in hello_tutorial/run/hello.run

[Norman Feske]

> For more information about the configuration language, and the concepts
> behind it, please refer to the release notes of the 10.05 release:
> 
>   http://genode.org/documentation/release-notes/10.05

...or refer to the documentation of init:

  http://genode.org/documentation/developer-resources/init

Norman