core, w32: Add hack to translate diag logger-fd
* src/assuan-support.c (my_spawn): Add hack to mark the logger fd for w32spawn translation.
The w32 spawn code needs to modify argv with
an updated fd that matches the real id
in the spawned process.
It uses spawn_fd_item_s.arg_loc for that.
We hack it here so that the arg_loc is set
for gpgsm's logger-fd without changing
the assuan API.
- GnuPG-Bug-Id: T4426