emulators/wine-devel: Adjust pkg32.sh to pkg 1.17.3

After recent changes, given an uninitialized root dir pkg now fails
with:

pkg: Error opening the trusted directory /usr/share/keys/pkg/trusted
pkg: Error loading trusted certificates

This works around it for our WoW setup.

PR: 259404
Approved by: Damjan Jovanovic <damjan.jov@gmail.com>