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/diagnostics/tests/java8Overrides/overridingMethodOfAnyDiamond.kt

@@ -0,0 +1,11 @@
+interface ILeft {
+    override fun toString(): String
+}
+
+interface IRight {
+    override fun toString(): String
+}
+
+interface IDiamond : ILeft, IRight {
+    <!METHOD_OF_ANY_IMPLEMENTED_IN_INTERFACE!>override fun toString(): String = "IDiamond"<!>
+}