Expanded and simplified test for generating bridges in sam conversions.

compiler/testData/codegen/boxAgainstJava/sam/adapters/BridgesForOverriddenComplex.java

@@ -0,0 +1,17 @@
+// KT-5912
+class JavaClass<T> {
+    public static interface Action<T> {
+        void call(T t);
+    }
+
+    public static class Some<T> {
+        public Some(T t) {
+        }
+    }
+
+    public static interface OnSubscribe<T> extends Action<Some<T>> {}
+
+    void perform(T t, OnSubscribe<T> subscribe) {
+        subscribe.call(new Some(t));
+    }
+}