webrtc-a545de4-prefixed-2

Same as webrtc-a545de4-prefixed (upstream livekit/rust-sdks webrtc-a545de4 desktop prebuilts with the bundled ffmpeg and BoringSSL symbol families renamed with a webrtc_ prefix), except the Windows x64 archive. That one had lost every symbol of its NASM-built members: llvm-objcopy 21 writes those COFF objects back with an empty symbol table. It is now rebuilt member by member with remap-win.sh: llvm-objcopy for the clang objects, coff_rename.py (a string-table rename) for the assembly objects, and the result checked against the expected symbol set per member. The linux, mac and win-arm64 archives are byte-identical to the previous release.