Moved the windows build echo command to after the environment variables.

The echo-ing of the environment when building windows distributions is exceedingly noisy, and often it is hard to see the wood from the trees. This change moves the echo on to be after the re-iteration of the build environment variables.
This comment explains why this was like this. I agree that it's annoying, though, and I'm not really sure how helpful this is. @ilanschnell