ccanlint: fix depends_build_without_features

This depends on reduce_features; currently it tends to run before
that, so it doesn't think there are any features to reduce and doesn't
build or run the tests with reduced features.

tools/ccanlint/tests/depends_build_without_features.c

@@ -55,7 +55,7 @@ struct ccanlint depends_build_without_features = {
 	.name = "Module's CCAN dependencies can be found or built (reduced features)",
 	.check = check_depends_built_without_features,
 	.can_run = can_build,
-	.needs = "depends_exist"
+	.needs = "depends_exist reduce_features"
 };
 
 REGISTER_TEST(depends_build_without_features);