[intel/portage] Partly sort package.use

I've sorted easier stuff of package.use.
I haven't removed anything, except few cases that were obsolete or duplicated.


Sorry for dropping that big chunk of commits, I did it to:
1) Have everything clear and easy to see where things go
2) Have everything consistent, no matter which commit, everything is in state that should just work
3) Make it easier to work with, provided that I wanted to make sure I did not mess it up.
..
4) You've made me do it. If it weren't so messy, there wouldn't be so many commits.