Update V8 DEPS.

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/b2d6a40..afb3374

TBR=machenbach@chromium.org,tmrts@chromium.org

Change-Id: I25440be508ac8ae6605e2bfbb099c4a524a90436
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1735186Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#63056}

DEPS

@@ -57,7 +57,7 @@ vars = {
 
 deps = {
   'v8/build':
-    Var('chromium_url') + '/chromium/src/build.git' + '@' + 'b2d6a4091f59f83dc6c03c3cb210c5590a93f9fd',
+    Var('chromium_url') + '/chromium/src/build.git' + '@' + 'afb3374a0f4a730e2b6c468b8b63be4f797bfe17',
   'v8/third_party/depot_tools':
     Var('chromium_url') + '/chromium/tools/depot_tools.git' + '@' + '921f6a17514698ebc9b037f1f1e8696b6c359fdd',
   'v8/third_party/icu':