Added load java test with deep Java-Kotlin subclassing.

compiler/testData/loadJavaCustom/deepSubclassingKotlinInJava/kotlin/A.kt

@@ -0,0 +1,5 @@
+package test
+
+public open class A {
+    public open fun foo(): String = ""
+}

compiler/testData/loadJavaCustom/deepSubclassingKotlinInJava/kotlin/C.kt

@@ -0,0 +1,5 @@
+package test
+
+public open class C: B() {
+    override fun foo(): String = ""
+}

compiler/testData/loadJavaCustom/deepSubclassingKotlinInJava/kotlin/E.kt

@@ -0,0 +1,5 @@
+package test
+
+public open class E: D() {
+    override fun foo(): String = ""
+}