Fixed a signing build error when building a Swift package with WebRTC dependency on Apple silicon macs (PR #61 - thanks @GhenadieVP )
Release notes: https://groups.google.com/g/discuss-webrtc/c/JyB8-JDfeB0?pli=1
WebRTC Branch: branch-heads/5414
WebRTC Commit: 4e8a5ac68e8a4ae0588f54f2fdb8cbd1eb5fa50d
SHA 256 checksum: 28f5fa694cc9ccc36eb5b7ac19305e1fbf0ade03eabfd02cbc0386cda693c9f1