Standard per-release update to 1.5.
1.5 labs added to Yocto website: https://www.yoctoproject.org/training/kernel-lab https://www.yoctoproject.org/sites/yoctoproject.org/files/kernel-lab-1.5.pdf https://www.yoctoproject.org/sites/yoctoproject.org/files/kernel-lab-1.5-layers.tar.bz2