Added test for loading Foo<?> type from Java.

compiler/testData/loadJava/UnboundWildcard.java

@@ -0,0 +1,10 @@
+package test;
+
+public final class UnboundWildcard {
+    public final MyClass<?> foo() {
+        throw new UnsupportedOperationException();
+    }
+
+    public interface MyClass<T extends CharSequence> {
+    }
+}

compiler/testData/loadJava/UnboundWildcard.kt

@@ -0,0 +1,7 @@
+package test
+
+public final class UnboundWildcard: Object() {
+    public final fun foo(): MyClass<*>? = throw UnsupportedOperationException()
+
+    public trait MyClass<T: CharSequence?>: Object
+}

compiler/testData/loadJava/UnboundWildcard.txt

@@ -0,0 +1,8 @@
+namespace test
+
+public final class test.UnboundWildcard : java.lang.Object {
+    public final /*constructor*/ fun <init>(): test.UnboundWildcard
+    public final fun foo(): test.UnboundWildcard.MyClass<out jet.CharSequence?>?
+    public abstract trait test.UnboundWildcard.MyClass</*0*/ T : jet.CharSequence?> : java.lang.Object {
+    }
+}