Trigger helpers/fetch for nabia

Here a list of helpers that I'm starting to register as they are not on the repositories, but are build correctly on local environment. I've have skipped a few thinking they might be just exceptions but I'm finding more and more.

Packages with helper not triggered for nabia

The following helpers might have not being triggered for nabia so the helper version might be missing on repositories: 

exim4
ltsp

Troubleshoot helpers

The helper on this package requires work.

• exim4 - !495 (closed) waiting on patch
• icecat - WIP? - #25 (closed)
• ltsp - needs complete rework of the helper package.

Packages not fetch from upstream to nabia