scripts: remove localversion "+" from kernel version strings

Signed-off-by: faux123 <reioux@gmail.com>
repo: update build script
Use Hashcode's prebuilt dt image. Building my own didn't boot.
Hashcode's commit said something about a legacy dtbtool, I suppose I'll
have to ask him about that eventually.
krunchkernel 001a1 config
This is still mostly just stock. I wanted to have it here so comparing
config changes is a little easier in the future.