fix portage package count

[xarblu]

To get an accurate count of portage packages only count the amount of 2 level deep directories. First level are package categories and he third are per package metadata and thus both shouldn't be counted.

[grtcdr]

Make sure to cargo fmt before you push, as any improperly formatted files will cause CI to freak out and fail.

We should probably set up a git hook for this.