Filter out non-builtin package fragments from module when needed

In subsequent commits, a JVM module will be able to have up to two package
fragments for a given package FQ name. For example, for package "kotlin" in
kotlin-runtime.jar there will be a LazyJavaPackageFragment with binary
(Kotlin+Java) dependencies, and a BuiltInsPackageFragment for built-ins
metadata (which is loaded from kotlin/kotlin.kotlin_builtins)

core/descriptor.loader.java/src/org/jetbrains/kotlin/builtins/JvmBuiltInClassDescriptorFactory.kt

@@ -31,7 +31,7 @@ class JvmBuiltInClassDescriptorFactory(
 ) : ClassDescriptorFactory {
     private val cloneable by storageManager.createLazyValue {
         ClassDescriptorImpl(
-                moduleDescriptor.getPackage(KOTLIN_FQ_NAME).fragments.single(),
+                moduleDescriptor.getPackage(KOTLIN_FQ_NAME).fragments.filterIsInstance<BuiltInsPackageFragment>().single(),
                 CLONEABLE_NAME, Modality.ABSTRACT, ClassKind.INTERFACE, listOf(moduleDescriptor.builtIns.anyType),
                 SourceElement.NO_SOURCE
         ).apply {