Add classifier usage checker for missing dependency classes

This has no effect for the original use case of mock class descriptors
(unresolved classes used in libraries), but is necessary for pre-release
classes in case the compiler is a release, because such classes end up in scope
and can be the result of the resolution

compiler/frontend.java/src/org/jetbrains/kotlin/resolve/jvm/platform/JvmPlatformConfigurator.kt

@@ -69,7 +69,9 @@ object JvmPlatformConfigurator : PlatformConfigurator(
                 JavaTypeAccessibilityChecker()
         ),
 
-        additionalClassifierUsageCheckers = listOf(),
+        additionalClassifierUsageCheckers = listOf(
+                MissingDependencyClassChecker.ClassifierUsage
+        ),
 
         additionalAnnotationCheckers = listOf(
                 RepeatableAnnotationChecker,