Move JVM8 box test to common

compiler/testData/codegen/box/delegation/diamond.kt

@@ -0,0 +1,36 @@
+// TARGET_BACKEND: JVM
+// FILE: Base.java
+
+public interface Base {
+    String getValue();
+
+    default String test() {
+        return getValue();
+    }
+}
+
+// FILE: Base2.java
+public interface Base2 extends Base {
+
+    default String test() {
+        return "O"  + getValue();
+    }
+}
+
+
+// FILE: main.kt
+
+interface KBase : Base
+
+interface Derived : KBase, Base2
+
+class Fail : Derived {
+    override fun getValue() = "Fail"
+}
+
+fun box(): String {
+    val z = object : Derived by Fail() {
+        override fun getValue() = "K"
+    }
+    return z.test()
+}