Update V8 DEPS.

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/2c98e63..3454c48

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

Change-Id: Iae143d41177d135ca2d0b4a49bd83ef8563a72b4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1698427Reviewed-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@{#62696}

DEPS

@@ -57,7 +57,7 @@ vars = {
 
 deps = {
   'v8/build':
-    Var('chromium_url') + '/chromium/src/build.git' + '@' + '2c98e6347e36b2bdc5c2e99c485090dcd82a7542',
+    Var('chromium_url') + '/chromium/src/build.git' + '@' + '3454c487f1ce2000a03ae34735d419e229de2b9e',
   'v8/third_party/depot_tools':
     Var('chromium_url') + '/chromium/tools/depot_tools.git' + '@' + 'd3af69947ef036f4db7f78a7e7cb8e5295daf6bd',
   'v8/third_party/icu':