add extra test for top level empty record match

Author: zth

jscomp/test/inline_record_test.js

@@ -126,3 +126,11 @@ let () = switch b {
 | A => Js.log("A!")
 | B({}) => Js.log("B")
 }
+
+type r = {y: int}
+let r = {y: 10}
+
+switch r {
+| {y: 10} => Js.log("10!")
+| {} => Js.log("Catch all?")
+}