fix: resolve elaborated types

[janvennemann]

This fixes an issue with elaborated types which were not properly resolved to their named type.

Example for elaborated types:

class A {};

int main()
{
    class A a; // OK: equivalent to 'A a;'
}

Fixes #380

[hansemannn]

Thank you for the fix! A simple test case works already, but running hyperloop-examples still fails (it seems like an issue with Cocoapods though). I would say we merge this one already and check for possible Cocoapods issues in a separate effort.