Windows: fix update of version information in wireshark and tshark

Broken since gc46329c

Change-Id: I00146675d16db021e2cbb7b16841ea9ecb1439b9
Reviewed-on: https://code.wireshark.org/review/2703
Reviewed-by: Evan Huus <eapache@gmail.com>
Reviewed-by: Pascal Quantin <pascal.quantin@gmail.com>