This annotation can be used for data types that can't be repacked
automatically even with custom repack annotations. With ptr_passthrough,
the types are wrapped in guest_layout and passed to the host like that.
This was checking for the wrong debug structure and it wasn't actually
unlinking it correctly from the linked list.
Since it was talking directly to a_0 instead of the current modifying
struct.
Instead of having a stubbed debug report struct, we can just remove the
structure from the linked list. Since we are already abusing a const
cast there anyway.
Fixes Vulkan thunks on Snapdragon.
Tony Wasserka