GN: Update Windows SDK version to 10586 in generated project files

It has already been updated to 10.0.10586.0 in other places
in the following CLs:
  https://codereview.chromium.org/1608013002
  https://codereview.chromium.org/1615603002

R=brettw@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1717603005

Cr-Original-Commit-Position: refs/heads/master@{#376857}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 687b6f3a94311da0094cc942413a9faef80d0b29
1 file changed
tree: 2e5e9d4c08c972b700c785a31cfe061e505577d6
  1. tools/