Fix serialization of type parameters inner generic class

The call to `createTopLevel` instead of `create` (which creates
serializers for outer classes properly, with correct type parameter
contexts) caused MetadataSerializer to write type parameter metadata
incorrectly.  For example, in the following case:

    class A<E> {
        inner class B<T, E> { ... }
    }

A's type parameter E would get id 0, and B's type parameters T and E
would get ids 0 and 1. This is a problem because ids are supposed to be
unique for each class including its outer classes, and deserializer,
decompiler and stub builder rely on this assumption.

JVM metadata is unaffected because `create` is called correctly there,
see MemberCodegen#generateKotlinClassMetadataAnnotation

 #KT-24944 Fixed

compiler/util/src/org/jetbrains/kotlin/utils/KotlinJavascriptMetadataUtils.kt

@@ -32,7 +32,7 @@ class JsMetadataVersion(vararg numbers: Int) : BinaryVersion(*numbers) {
 
     companion object {
         @JvmField
-        val INSTANCE = JsMetadataVersion(1, 2, 1)
+        val INSTANCE = JsMetadataVersion(1, 2, 2)
 
         @JvmField
         val INVALID_VERSION = JsMetadataVersion()