Update V8 DEPS.

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/66cd756..12badc1

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

Change-Id: I11dd012d8a4c8775f6ddeac2190df8ce496da986
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3376582
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@{#78525}

DEPS

@@ -83,7 +83,7 @@ deps = {
   'base/trace_event/common':
     Var('chromium_url') + '/chromium/src/base/trace_event/common.git' + '@' + '7f36dbc19d31e2aad895c60261ca8f726442bfbb',
   'build':
-    Var('chromium_url') + '/chromium/src/build.git' + '@' + '66cd7561fba5fd41f2f3cd6ff31ed7e3931e7c1b',
+    Var('chromium_url') + '/chromium/src/build.git' + '@' + '12badc1f9a093277377e961d26995d2f11bc7f76',
   'buildtools':
     Var('chromium_url') + '/chromium/src/buildtools.git' + '@' + 'f78b4b9f33bd8ef9944d5ce643daff1c31880189',
   'buildtools/clang_format/script':