Support reflection tests on Android

compiler/testData/codegen/box/classes/classObjectToString.kt

@@ -1,9 +1,12 @@
 // TODO: Enable for JS when it supports Java class library.
 // TARGET_BACKEND: JVM
+
+package test
+
 class SomeClass { companion object }
 
-fun box() = 
-    if ((SomeClass.toString() as java.lang.String).matches("SomeClass\\\$Companion@[0-9a-fA-F]+"))
+fun box() =
+    if ((SomeClass.toString() as java.lang.String).matches("test.SomeClass\\\$Companion@[0-9a-fA-F]+"))
         "OK"
     else
         "Fail: $SomeClass"