* [fuchsia] Create command to gather fuchsia artifacts
- We will use this gathered artifacts to create the
directory tree that we will package to a far.
- Currently this is not used anywhere, we will use it
as such:
1. Build all the fuchsia artifacts
2. Gather the artifacts to a directory
3. Use `pm` to package up the directory into a far.
* reformat files
* commit chromium style
* [fuchsia] Use the directory format that fuchsia expects
* Farify the artifacts
* Create far archives and have tmp artifact dir
