Don't make traits and annotations inherit from KObject

#KT-5609 Fixed

compiler/testData/codegen/boxWithStdlib/regressions/kt5609.kt

@@ -0,0 +1,30 @@
+// KT-5609: interfaces should not inherit from KObject, unless explicitly said so
+
+trait A
+
+trait B : kotlin.jvm.internal.KObject
+
+annotation class C
+
+class D
+
+class E : kotlin.jvm.internal.KObject
+
+fun box(): String {
+    val a = javaClass<A>().getGenericInterfaces().toList()
+    if (a.toString() != "[]") return "Fail A: $a"
+
+    val b = javaClass<B>().getGenericInterfaces().toList()
+    if (b.toString() != "[interface kotlin.jvm.internal.KObject]") return "Fail B: $b"
+
+    val c = javaClass<C>().getGenericInterfaces().toList()
+    if (c.toString() != "[interface java.lang.annotation.Annotation]") return "Fail C: $c"
+
+    val d = javaClass<D>().getGenericInterfaces().toList()
+    if (d.toString() != "[interface kotlin.jvm.internal.KObject]") return "Fail D: $d"
+
+    val e = javaClass<E>().getGenericInterfaces().toList()
+    if (e.toString() != "[interface kotlin.jvm.internal.KObject]") return "Fail E: $e"
+
+    return "OK"
+}