[Applications][Tizen] Add a tool to add an application to the App DB

Tizen has a custom way to register applications into its application
registry, some of the steps need to run as system administrator, so we
separate the steps that need super user access into a small binary
that will be called by the core Crosswalk.

A small amount of effort is made to at least test-compile this tool on
Linux Desktop, to make it easier to detect that some Chromium API has
changed.