message: Avoid using lld when compiling iin iOS with bitcode
  The resulting framework's LLVM __bundle segment is empty otherwise.
  Cr-Commit-Position: refs/heads/main@{#36178}
diff: @@ -180,6 +180,7 @@ def BuildWebRTC(output_dir, target_environment, target_arch, flavor,
  ('true' if libvpx_build_vp9 else 'false'))
  gn_args.append('enable_ios_bitcode=' + ('true' if use_bitcode else 'false'))
  + gn_args.append('use_lld=' + ('false' if use_bitcode else 'true'))
  gn_args.append('use_goma=' + ('true' if use_goma else 'false'))
  gn_args.append('rtc_enable_objc_symbol_export=true')
  