This patch modifies linux/ffmpeg-install.sh to work also for macOS.
The FFmpeg libraries are installed under /usr/local both for Linux
and macOS.
Since macOS x64 does not have the lzma lib for arm64 architecture
installed by default, I disable this libraries for FFmpeg. This
only affects the TIFF image decoder that we do not use.
Added the execute permission to the ubuntu scripts.
Change-Id: Ib8623c6a9bcdd24c89045ede0494839fb9cd2ecc
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
(cherry picked from commit 51c663d171)
Reviewed-by: Lars Knoll <lars@knoll.priv.no>