TypeAliasTemplateDecl not emitted

[Kiskae]

For some reason TypeAliasTemplateDecl does not contain the information required to find what the original TypeAlias declaration is. Attempting to retrieve the type created by the alias results in a nullptr.
For now the exporting of this information is effectively disabled.

Testing code:

namespace template_specialization_test {
    template<typename Z>
    using Ptr = Z*;

    Ptr<int> t = nullptr;
}