rust.proc_macro: fix type of kwargs["native"]

Signed-off-by: Paolo Bonzini <[email protected]>

Author: bonzini

mesonbuild/modules/rust.py

@@ -705,7 +705,7 @@ def bindgen(self, state: ModuleState, args: T.List, kwargs: FuncBindgen) -> Modu
     @typed_pos_args('rust.proc_macro', str, varargs=SOURCES_VARARGS)
     @typed_kwargs('rust.proc_macro', *SHARED_LIB_KWS, allow_unknown=True)
     def proc_macro(self, state: ModuleState, args: T.Tuple[str, SourcesVarargsType], kwargs: _kwargs.SharedLibrary) -> SharedLibrary:
-        kwargs['native'] = True  # type: ignore
+        kwargs['native'] = MachineChoice.BUILD
         kwargs['rust_crate_type'] = 'proc-macro'
         kwargs['rust_args'] = kwargs['rust_args'] + ['--extern', 'proc_macro']
         target = state._interpreter.build_target(state.current_node, args, kwargs, SharedLibrary)