Woof: kernel selection

Selection of which kernel to use in a build needs to be done early-on, as some packages are kernel-version-dependent, so selection of the right packages to use in a build requires that the kernel is already selected.

The current uploaded Woof now has kernel-selection in the first tab of the woof_gui GUI.

However, if not using the GUI and doing the build by running the scripts directly, the kernel selection is in 3builddistro. I have now moved this to 1download.

I reorganized 1download so that online kernel PETs are downloaded near the beginning of the script, then the kernel is chosen. After that, the correct packages can be chosen and downloaded.

Tags: woof