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/psi/src/org/jetbrains/kotlin/psi/stubs/KotlinStubVersions.kt

@@ -36,9 +36,9 @@ object KotlinStubVersions {
 
     // BuiltIn stub version should be increased if changes are made to builtIn stub building subsystem (org.jetbrains.kotlin.idea.decompiler.builtIns)
     // Increasing this version will lead to reindexing of all builtIn files (see KotlinBuiltInFileType).
-    const val BUILTIN_STUB_VERSION = BINARY_STUB_VERSION + 1
+    const val BUILTIN_STUB_VERSION = BINARY_STUB_VERSION + 2
 
     // JS stub version should be increased if changes are made to js stub building subsystem (org.jetbrains.kotlin.idea.decompiler.js)
     // Increasing this version will lead to reindexing of js binary files (see KotlinJavaScriptMetaFileType).
-    const val JS_STUB_VERSION = BINARY_STUB_VERSION + 1
+    const val JS_STUB_VERSION = BINARY_STUB_VERSION + 2
 }