Minor, add test for obsolete issue

#KT-4021 Obsolete

compiler/testData/diagnostics/tests/j+k/packagePrivateClassStaticMember.kt

@@ -0,0 +1,17 @@
+// KT-4021 Java's Package visibilty does not work for static methods
+
+// FILE: foo/Bar.java
+
+package foo;
+
+class Bar {
+    static void baz() {}
+}
+
+// FILE: main.kt
+
+package foo
+
+fun main() {
+    Bar.baz()
+}