Merge remote-tracking branch 'origin/DEV_Xogium' into DEV_jookia

board/MynaPlayer odyssey: provide hopefully temporary init.d replacement. ...

Currently eudev needs a script in /etc/init.d to work. But we don't want all the other sysvinit scripts provided by buildroot, so we more the directory in the postbuild script, and remplace it with our own.

board/MynaPlayer odyssey: migrate to busybox. ...

This is very early work, and is still unfinished.

Merge branch 'stable-dev-board' into DEV_jookia

board/MynaPlayer odyssey: removed initramfs. ...

This build no longer requires an initramfs. It has hence been removed entirely. The associated defconfig is deleted, as are the postbuild and postimage scripts and overlays. The patches have been relocated to the rootfs_patches directory. Also worth noting is that the machine-id setup is entirely gone from the build system.

Merge branch 'WIP_rauc_fixup' into DEV_jookia

Revert "rootfs_postbuild: Run rauc_fixups here instead of in the makefile" ...

This solution is actually racy and dirty as it edits stuff outside the
build tree.

This reverts commit 042373f.

Merge branch 'WIP_rauc_fixup' into TMP_jookia

rootfs_postbuild: Run rauc_fixups here instead of in the makefile ...

This ensures the rauc certificates are always fixed up to the latest
config.

Add copyright notice on initramfs/rootfs scripts

Add SPDX-License-Identifier to scripts ...

Clarify the license of copyrighted works made by Xogium.
This deliberately excludes files that may not be copyrightable such as
purely informative files like hashes for packages, config values,
systemd units, and machine generated files.

board/MynaPlayer odyssey: only copy machine-id into the target with postbuild scripts. Use a device table file to alter its permissions later -- this avoids getting a permission denied error if you have to run the postbuild script multiple times e.g: build errors with trying multiple fixes.

Reworked certificates handling. The certs.sh.example contains a full example of this, and must be copied to certs.sh, and modified accordingly to reflect the real paths where the certificates are stored. A script that can be called by any board is creating symlinks from the real paths to corresponding statics targets for usage in genimage and postbuild scripts. The certs folder in the external tree must never be distributed in the repository, and is hence ignored via .gitignore.

board/MynaPlayer odyssey: copy rauc's keyring by parsing certs.txt.

Initial commit.