JVM box tests for KT-21092

compiler/testData/codegen/box/callableReference/kt21092b.kt

@@ -0,0 +1,12 @@
+// TARGET_BACKEND: JVM
+// IGNORE_BACKEND: JVM
+// WITH_RUNTIME
+
+class A<T>(val b: T)
+
+fun box(): String {
+    val test = A(1).b::javaClass.get().simpleName
+    if (test != "Integer") throw Exception("test: $test")
+
+    return "OK"
+}