Update V8 DEPS.

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/f48946c..34b1290

Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/2cbae8a..5abb9b7

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

Change-Id: Ia24eb083291276b5f4e8a2535bb16e21204ee05e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1857430Reviewed-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@{#64265}

DEPS

@@ -71,9 +71,9 @@ vars = {
 
 deps = {
   'v8/build':
-    Var('chromium_url') + '/chromium/src/build.git' + '@' + 'f48946c0fe382c0aa4987cd16fe56e77afcb1c08',
+    Var('chromium_url') + '/chromium/src/build.git' + '@' + '34b12904d8e4897909b6172f7a4bea22f5b6cf19',
   'v8/third_party/depot_tools':
-    Var('chromium_url') + '/chromium/tools/depot_tools.git' + '@' + '2cbae8a8b9f61ad88e51f3b9fa30f97824db614b',
+    Var('chromium_url') + '/chromium/tools/depot_tools.git' + '@' + '5abb9b7c5d0c0a5f81f4a0da741680df9b9d128c',
   'v8/third_party/icu':
     Var('chromium_url') + '/chromium/deps/icu.git' + '@' + '5005010d694e16571b8dfbf07d70817841f80a69',
   'v8/third_party/instrumented_libraries':