2022.08: SkiffOS Mainline Release

This mainline release corresponds to Buildroot 2022.08.

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Changes since SkiffOS 2022.05.2:

• Buildroot: see Release notes
• browser/v86: enable options for better memory efficiency
• jetson/{tx2, nano}: move to linux4tegra-legacy
• Security updates to docker, runc, containerd, etc.
• modalai/voxl2: numerous fixes & improvements
• intel/desktop: add rEFInd and cleanup EFI partition handling
• allwinner/d1: bump u-boot to 2022.07-rc3
• core/fedora: add warning if targeting invalid architecture

New devices:

• jetson/agx: add support for Jetson AGX Orin and Xavier