Enable rendering backend in build script#9

ipavlidakis merged 6 commits intomainGetStream/stream-video-swift-webrtc:mainfrom

ipavlidakis/update-webrtc-build-to-include-stream_enable_rendering_backendGetStream/stream-video-swift-webrtc:ipavlidakis/update-webrtc-build-to-include-stream_enable_rendering_backendCopy head branch name to clipboard