Fix supertypes for reflected Java classes, always include j.l.Object

equals/hashCode/toString had not appeared in Java classes' "members" because of
this

compiler/testData/codegen/boxWithJava/reflection/javaClassGetFunctions/J.java

@@ -0,0 +1,10 @@
+public class J {
+    public J() {
+    }
+
+    public void member(String s) {
+    }
+
+    public static void staticMethod(int x) {
+    }
+}

compiler/testData/codegen/boxWithJava/reflection/javaClassGetFunctions/K.kt

@@ -0,0 +1,12 @@
+import kotlin.reflect.*
+import kotlin.test.assertEquals
+
+fun box(): String {
+    assertEquals(listOf("equals", "hashCode", "member", "staticMethod", "toString"), J::class.members.map { it.name }.toSortedList())
+    assertEquals(listOf("equals", "hashCode", "member", "staticMethod", "toString"), J::class.functions.map { it.name }.toSortedList())
+    assertEquals(listOf("member", "staticMethod"), J::class.declaredFunctions.map { it.name }.toSortedList())
+
+    assertEquals(1, J::class.constructors.size())
+
+    return "OK"
+}

compiler/tests/org/jetbrains/kotlin/codegen/generated/BlackBoxWithJavaCodegenTestGenerated.java

@@ -273,6 +273,12 @@ public class BlackBoxWithJavaCodegenTestGenerated extends AbstractBlackBoxCodege
             doTestWithJava(fileName);
         }
 
+        @TestMetadata("javaClassGetFunctions")
+        public void testJavaClassGetFunctions() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/boxWithJava/reflection/javaClassGetFunctions/");
+            doTestWithJava(fileName);
+        }
+
         @TestMetadata("javaMethodsSmokeTest")
         public void testJavaMethodsSmokeTest() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/boxWithJava/reflection/javaMethodsSmokeTest/");

core/descriptors.runtime/src/org/jetbrains/kotlin/load/java/structure/reflect/ReflectJavaClass.kt

@@ -21,8 +21,6 @@ import org.jetbrains.kotlin.load.java.structure.JavaClassifierType
 import org.jetbrains.kotlin.load.java.structure.JavaType
 import org.jetbrains.kotlin.load.java.structure.JavaTypeSubstitutor
 import org.jetbrains.kotlin.name.Name
-import org.jetbrains.kotlin.utils.emptyOrSingletonList
-import java.lang.reflect.AnnotatedElement
 import java.lang.reflect.Method
 import java.util.Arrays
 
@@ -49,12 +47,8 @@ public class ReflectJavaClass(
     override fun getOuterClass() = klass.getDeclaringClass()?.let(::ReflectJavaClass)
 
     override fun getSupertypes(): Collection<JavaClassifierType> {
-        val supertype = klass.getGenericSuperclass()
+        if (klass == javaClass<Any>()) return emptyList()
-        val superClassName = (supertype as? Class<*>)?.getName()
+        return listOf(klass.genericSuperclass ?: javaClass<Any>(), *klass.genericInterfaces).map(::ReflectJavaClassifierType)
-        val supertypes =
-                (if (superClassName == "java.lang.Object") emptyList() else emptyOrSingletonList(supertype)) +
-                klass.getGenericInterfaces()
-        return supertypes.map(::ReflectJavaClassifierType)
     }
 
     override fun getMethods() = klass.getDeclaredMethods()