Update V8 DEPS.

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/213e0a3..402bc6d

TBR=machenbach@chromium.org,hablich@chromium.org,sergiyb@chromium.org

Change-Id: If20446c4127d59fd9e7c5055c9594f4fae164d27
Reviewed-on: https://chromium-review.googlesource.com/c/1424278Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Sergiy Belozorov <sergiyb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58943}

DEPS

@@ -16,7 +16,7 @@ vars = {
 
 deps = {
   'v8/build':
-    Var('chromium_url') + '/chromium/src/build.git' + '@' + '213e0a3a3d17d89b6513181a28956166a9c2141c',
+    Var('chromium_url') + '/chromium/src/build.git' + '@' + '402bc6d411d747879f1109aad176769ac8a14dd7',
   'v8/third_party/depot_tools':
     Var('chromium_url') + '/chromium/tools/depot_tools.git' + '@' + 'f7971436824dd8eeb9b0cf19dabc3e32b369a904',
   'v8/third_party/icu':