Blender Git Loki

Buldbot: Disable 32bit kernels

Currently disable all of them, in practice i think way to go should be:

- Disable Experimental kernels on 32 bit, build up to sm_35
- Later we can drop all 32bit kernels, but try to keep at least one release
with some of the kernels (they'll cover 99% of users anyway)

Before doing any changes we should surely communicate such a changes before
we apply them.