Update V8 DEPS.

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/29207aa..33f080d

Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/8820ab8..b9a5e83

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

Change-Id: Ic0a241223c26cdfb3ebe26d2588c150cfb95ef7c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2560687Reviewed-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@{#71418}

DEPS

@@ -88,9 +88,9 @@ vars = {
 
 deps = {
   'build':
-    Var('chromium_url') + '/chromium/src/build.git' + '@' + '29207aa70b29404e1366ec461fe1edbc90134768',
+    Var('chromium_url') + '/chromium/src/build.git' + '@' + '33f080dd0ce413546e9491fa7ce0d52b0e4600eb',
   'third_party/depot_tools':
-    Var('chromium_url') + '/chromium/tools/depot_tools.git' + '@' + '8820ab859bea6cf5ed2751c9373098a688ad1a03',
+    Var('chromium_url') + '/chromium/tools/depot_tools.git' + '@' + 'b9a5e83e55ee6272e86ffbe2a628f1bc71511e31',
   'third_party/icu':
     Var('chromium_url') + '/chromium/deps/icu.git' + '@' + '6a33b647c0647c3eb97eae5432153ef2dfca7baa',
   'third_party/instrumented_libraries':