Prepare for better device categorization by moving everything to testing
subdir first.
[skip-ci]: chicken-egg problem: passing pmaports CI depends on pmbootstrap MR
depends on this MR
Related: postmarketos#16
Nokia only provides .zip files without any git history, so I had to
download the kernel git repo for 3.18.79 and then apply all downstream
changes as one singular commit to preserve at least some of the history.
My previous PC had big problems with creating patch files for symlinks
so I added some commits that should have been in patchfiles instead.
This merge request fixes that, leaving in repo just 3.18.79+downstream
patches and all my patches as patchfiles inside aports.
[ci:skip-build]: already built successfully in CI
