Fix composite type registration in the new compiler

Fix composite type registration in the new compiler

When setting a property of a composite type like this

    property MyType foo: MyType {}

and MyType.qml defines the new type, we test for assignability of MyType to the
property foo. This test happens before MyType is instantiated and it relies on
the meta-type in the CompiledData being set. Therefore this patch makes sure
that the meta-type and the list meta-type are set accordingly at type
compilation time, not instantiation time, similar to how it's done in the VME.

Change-Id: Id7231e0a0113fa63ba6508bfbb1565dd554c5e56
Reviewed-by: Lars Knoll <lars.knoll@digia.com>