Needed by modules using DIA SDK, which is located in "[windows_sdk]/DIA SDK",
not under "[windows_sdk]/win_sdk".

Change-Id: I1ca42a38ef8d9d1cbfde5e63e786b7d792504f3c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1526453
Commit-Queue: Robbie Iannucci <iannucci@chromium.org>
Auto-Submit: Veranika Liaukevich <veranika@chromium.org>
Reviewed-by: Robbie Iannucci <iannucci@chromium.org>