The FFmpeg building flow has become too different on linux and macos.
Decoupling the logic makes it more simple to follow.
The CR also fixes nits and shellcheck warnings in install-ffmpeg.
Pick-to: 6.8 6.9
Change-Id: I28639d28c7210809e52ff18ce612da52f8754285
Reviewed-by: Jøger Hansegård <joger.hansegard@qt.io>
This patch adds FFmpeg provisioning for Android and iOS for
qtci-macos-12..15-arm..x86-64 by syncing with qtci-macos-13-x86_64
where this was already done.
Pick-to: 6.8
Change-Id: I070514cbff12504db7c6fa77111e12d7e500ce30
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
