Update upgrade recipes to 3.6.2.
Add upgrade package promise for AIX.

Right now it doesn't use cf-upgrade, because it hasn't been tested on
AIX. However, AIX seems to be well behaved when it comes to
overwriting files, so the upgrade will go just fine. Tested by
upgrading from 3.6.1 to 3.6.2 on AIX 5.3.
Merge pull request #333 from kacfengine/upgrade_fixes

Upgrade fixes