add trybuild tests to routing codegen (#1677)

actix-web-codegen/tests/trybuild/simple-fail.rs

@@ -0,0 +1,25 @@
+use actix_web::*;
+
+#[get("/one", other)]
+async fn one() -> impl Responder {
+    HttpResponse::Ok()
+}
+
+#[post(/two)]
+async fn two() -> impl Responder {
+    HttpResponse::Ok()
+}
+
+static PATCH_PATH: &str = "/three";
+
+#[patch(PATCH_PATH)]
+async fn three() -> impl Responder {
+    HttpResponse::Ok()
+}
+
+#[delete("/four", "/five")]
+async fn four() -> impl Responder {
+    HttpResponse::Ok()
+}
+
+fn main() {}