Obsolete tools/winXX-setup.sh:
- Move DOWNLOAD_TAG into config.nmake
- Call win-setup.sh directly instead of winXX-setup.sh
- TODO: Remove tools/winXX-setup.sh files

Change-Id: Ie02b6b468b4f3007f5e2b6a8282e2e6cdf7d1a70
Reviewed-on: https://code.wireshark.org/review/3144
Reviewed-by: Jörg Mayer <jmayer@loplof.de>