universal property
Whether to build a universal (arm64 + x86_64) binary.
When true, passes -DCMAKE_OSX_ARCHITECTURES=arm64;x86_64.
Defaults to false (build only the hooks-provided target architecture).
With Flutter Native Assets / code_assets, keep this false: the hooks
system invokes the builder once per target architecture and merges the
per-architecture dylibs into a universal binary itself. Enabling
universal there produces a fat dylib per invocation and breaks the
final lipo -create merge.
Implementation
final bool universal;