[PATCH v3 0/2] MR7119: ntdll, loader: Add __attribute__((used)) to a few symbols that shouldn't be discarded.

[William Horvath (＠whrvth)]

These changes are enough to allow building the entirety of the native (ELF) side with `-flto`.

--
  v3: loader: Mark thread_ldt, thread_data, wld_start "used".
      ntdll: Mark call_init_thunk and abort_thread "used".
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/7119