- we have all the needed information in gbuild
- reduce the amount of double and triple bookkeeping
- hopefully the generated files for scp2 are only a intermediate step
  and we can do whatever perl voodoo scp2 does directly in gbuild
- currently using basctl as an example
- this also means we have to be more strict in Repository.mk with what
  we register:
  - if we dont build a libs, it shouldnt be registered (otherwise scp2
    will want the nonexisting lib)
  - in the end, this is a Good Thing(tm): we dont want anyone trying to
    e.g. link against a lib we dont build
- should now hopefully work on all platforms
- added module bookkeeping to gbuild

Change-Id: I241ca67edbfabae83859274f9aa35d2d26165ef6