Add different tests on class loaders in reflection

compiler/testData/codegen/reflection/classLoaders/parentFirst.kt

@@ -0,0 +1,15 @@
+package test
+
+import kotlin.reflect.KClass
+import kotlin.test.*
+
+class K
+
+class Test {
+    fun kClass(): Any = K::class
+
+    fun doTest(k1: KClass<*>, k2: KClass<*>) {
+        // KClass instances should be equal for classes loaded with the child and the parent
+        assertEquals(k1, k2)
+    }
+}