VLCKit: add support for Apple Silicon on macOS

This fixes #448 (closed) for the v4 branch.

changed milestone to %4.0

added Maintenance buildsystem macOS labels

added 2 commits

• eadbc5cd - VLCKit: add support for Apple Silicon on macOS
• da4be997 - build script: allow to configure the number of cores being used for compilation

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added 2 commits

• f72a138d - build script: allow to configure the number of cores being used for compilation
• 88347a50 - libvlc: fix ffmpeg cross compilation for macOS on macOS

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requested review from @jbk

approved this merge request

merged