A test for the case fixed in 291741754b

When Java binaries refer to Kotlin binaries, and then some Kotlin source refers to the same Kotlin binary class, we should load this class consistently

compiler/testData/loadJava/kotlinAgainstCompiledJavaWithKotlin/javaRefersToKotlin.kt

@@ -0,0 +1,5 @@
+package test
+
+trait K1 : J {
+    override fun foo(k: K?)
+}