win: Switch to 10.0.14393.0 SDK

The 10.0.14393.0 SDK was packaged at the same time as the 10.0.10586.0
SDK, during the switch to VS 2015 Update 3. The only reason the SDK
wasn't switched at the same time was to isolate the two changes from
each other, and there's no reason I am aware not to change the SDK now.

R=brucedawson@chromium.org
BUG=440500

Review-Url: https://codereview.chromium.org/2555393003
Cr-Commit-Position: refs/heads/master@{#437190}
2 files changed