Cant build image with this layer in YOCTO

[perrochiba-cpu]

Hi, i need some help building this to my raspberry pi image in yocto. I understand that this layer runs on branch krogoth, but when i start a build with master branch, the command line tells me that this layer only works with the hardknott branch of open-embedded core. I cant change to krogoth branch because i have incompatibilities with python 2 scripts, running over python 3.

[johannesschrimpf]

@perrochiba-cpu Feel free to have a look at this PR #14