'is' works on class type parameters

idea/testData/codegen/typeInfo/isTypeParameter.jet

@@ -0,0 +1,13 @@
+class Foo() {}
+class Bar() {}
+
+class InstanceChecker<T>() {
+  fun check(obj: Any?) = obj is T
+}
+
+fun box(): String {
+  val checker = InstanceChecker<Foo>()
+  if (!checker.check(Foo())) return "fail 1"
+  if (checker.check(Bar())) return "fail 2"
+  return "OK"
+}