Ensure libvlc artifact uniqueness
Description
When building the libvlc artifact, the build date is added somewhere. We want to ensure the artifact build uniqueness (building from the same commit on different machines / times provide the same exact file).
We have to look what data is added at compile time and remove all the one that are changing between builds to solve this.
We should also maybe discuss if it's needed for other libvlc use (desktop, iOS) and if some changes are needed for the medialibrary artifact.