message: Try emitting .o
diff: @@ -8,6 +8,7 @@ use cranelift_object::{ObjectModule, ObjectBuilder};
  use cranelift_module::{default_libcall_names, Module};
  use cranelift_native;
  use std::collections::HashMap;
  +use std::fs;
  struct RTSigs {
  print_int: ir::Signature
  @@ -199,5 +200,7 @@ fn main() {
  trans.compile_func(bril_func);
  }
  - trans.module.finish();
  + let prod = trans.module.finish();
  + let objdata = prod.emit().expect("emission failed");
  + fs::write("bril.o", objdata).expect("failed to write .o file");
  }
  