Update upgrade recipes to 3.6.2.

(cherry picked from commit b0c63e0d7fb119e4709e362820a44a481e097b4e)
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.

(cherry picked from commit 68d7dcd3f05772eb62ffa4dfc58f86532dd2256d)