Update V8 DEPS.

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/ed3b0ef..19909af

R=v8-waterfall-sheriff@grotations.appspotmail.com,mtv-sf-v8-sheriff@grotations.appspotmail.com

Change-Id: I1afde2c861ba619fdbbbe403e2899ad09d6adb24
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3492580
Commit-Queue: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Bot-Commit: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#79300}

DEPS

@@ -83,7 +83,7 @@ deps = {
   'base/trace_event/common':
     Var('chromium_url') + '/chromium/src/base/trace_event/common.git' + '@' + 'd115b033c4e53666b535cbd1985ffe60badad082',
   'build':
-    Var('chromium_url') + '/chromium/src/build.git' + '@' + 'ed3b0ef5aad5cee522eea5766d005048e8b398c8',
+    Var('chromium_url') + '/chromium/src/build.git' + '@' + '19909af581b7c4374470839caee2e6ba35cfa795',
   'buildtools':
     Var('chromium_url') + '/chromium/src/buildtools.git' + '@' + '893aa038dd17d05f3c5ff5af98daebabc294a948',
   'buildtools/clang_format/script':