Move JVM8 box test to common

compiler/testData/codegen/box/jvm8/simpleCall.kt

@@ -0,0 +1,16 @@
+// TARGET_BACKEND: JVM
+// JVM_TARGET: 1.8
+
+interface Test {
+    fun test(): String {
+        return "OK"
+    }
+}
+
+class TestClass : Test {
+
+}
+
+fun box(): String {
+    return TestClass().test()
+}