Add test for obsolete issue

#KT-4609 Obsolete

compiler/testData/loadJava/compiledJava/WildcardBounds.java

@@ -0,0 +1,9 @@
+package test;
+
+import java.lang.CharSequence;
+
+public class WildcardBounds {
+    static class A<T> {}
+
+    void foo(A<? extends CharSequence> x, A<? super String> y) {}
+}