jpeglib has no pre-built ARM64 wheel and the source tarball is missing
libjpeg header files. This adds a workaround that downloads the official
libjpeg headers before building.
- Add rpi/patches/jpeglib/install-jpeglib-arm64.sh helper script
- Update setup.sh to download headers when building from source
- Downloads headers for libjpeg 6b, 7-9f, turbo, and mozjpeg versions
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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