Update V8 DEPS.

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/2d94fa5..ff0b5c1

Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/67e1228..46ef281

TBR=machenbach@chromium.org,tmrts@chromium.org,v8-waterfall-sheriff@grotations.appspotmail.com

Change-Id: I7fd43af962a4b7da6e1641e6990776aedb46fb84
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2603522Reviewed-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@{#71878}

DEPS

@@ -88,9 +88,9 @@ vars = {
 
 deps = {
   'build':
-    Var('chromium_url') + '/chromium/src/build.git' + '@' + '2d94fa57d93472a3fad4f1f9e6a71e170fba4b71',
+    Var('chromium_url') + '/chromium/src/build.git' + '@' + 'ff0b5c1349e2b5fae31211bbc5819074eda3e0b6',
   'third_party/depot_tools':
-    Var('chromium_url') + '/chromium/tools/depot_tools.git' + '@' + '67e12286df04ef0eeec3aeaf6f224d2fe11751b7',
+    Var('chromium_url') + '/chromium/tools/depot_tools.git' + '@' + '46ef281c525f704bb9445142e9e4d70dacae7d4d',
   'third_party/icu':
     Var('chromium_url') + '/chromium/deps/icu.git' + '@' + '899e18383fd732b47e6978db2b960a1b2a80179b',
   'third_party/instrumented_libraries':