message: update(compiler) fixed new warning
diff: @@ -1685,7 +1685,7 @@ pub fn tbaa_label<'ctx>(
  .get_global_metadata("wasmer_tbaa_root")
  .pop()
  .unwrap_or_else(|| {
  - module.add_global_metadata("wasmer_tbaa_root", &context.metadata_node(&[]));
  + module.add_global_metadata("wasmer_tbaa_root", &context.metadata_node(&[])).unwrap();
  module.get_global_metadata("wasmer_tbaa_root")[0]
  });
  @@ -1699,7 +1699,7 @@ pub fn tbaa_label<'ctx>(
  module.add_global_metadata(
  label.as_str(),
  &context.metadata_node(&[type_label.into(), tbaa_root.into()]),
  - );
  + ).unwrap();
  module.get_global_metadata(label.as_str())[0]
  });
  @@ -1721,11 +1721,11 @@ pub fn tbaa_label<'ctx>(
  type_tbaa.into(),
  intrinsics.i64_zero.into(),
  ]),
  - );
  + ).unwrap();
  module.get_global_metadata(label.as_str())[0]
  });
  // Attach the access tag to the instruction.
  let tbaa_kind = context.get_kind_id("tbaa");
  - instruction.set_metadata(type_tbaa, tbaa_kind);
  + instruction.set_metadata(type_tbaa, tbaa_kind).unwrap();
  }
  