Fix #4536: Add regression test

Author: nicolasstucki

compiler/test-resources/repl/i4536

@@ -0,0 +1,14 @@
+scala> object Foo { def apply() = 1; def apply()(implicit ord: Ordering[Int]) = 2; Foo() }
+1 | object Foo { def apply() = 1; def apply()(implicit ord: Ordering[Int]) = 2; Foo() }
+  |                                                                             ^^^
+  |Ambiguous overload. The overloaded alternatives of method apply in object Foo with types
+  | ()(implicit ord: Ordering[Int]): Int
+  | (): Int
+  |both match arguments ()
+scala> object Foo { def apply() = 1; def apply()(implicit ord: Ordering[Int]) = 2; Foo.apply() }
+1 | object Foo { def apply() = 1; def apply()(implicit ord: Ordering[Int]) = 2; Foo.apply() }
+  |                                                                             ^^^^^^^^^
+  |Ambiguous overload. The overloaded alternatives of method apply in object Foo with types
+  | ()(implicit ord: Ordering[Int]): Int
+  | (): Int
+  |both match arguments ()