Java 8 rules for method overrides:

- report errors on implementing methods of Any in interfaces
- update testData

~~~

Java 8 override restrictions: interface can't implement a method of 'Any'
- update compiler sources

compiler/testData/codegen/boxWithStdlib/dataClasses/tostring/alreadyInherited.kt

@@ -1,8 +1,8 @@
-interface SuperTrait {
+abstract class SuperTrait {
   override fun toString(): String = "!"
 }
 
-data class A(val x: Int): SuperTrait {
+data class A(val x: Int): SuperTrait() {
 }
 
 fun box(): String {