RFR: JDK-8203932: Windows devkit has wrong dlls in 32 bit tools dir

[Erik Joelsson]

The generator script for the new windows 2017 devkit has a bug. It puts 
the 64bit redistributable runtime libraries in the 32 bit tools dir. 
This causes the 32 bit tools to only work on machines with VS2017 
already installed on them. This patch fixes the script to copy the 
correct DLLs.

Bug: https://bugs.openjdk.java.net/browse/JDK-8203932

Webrev: http://cr.openjdk.java.net/~erikj/8203932/webrev.01/

/Erik