Update V8 DEPS.

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/3cf06a3..a0862c3

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

Change-Id: I5a9f0ed25ca228f0ce17cbdf03611d82bcde4b82
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3006535Reviewed-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@{#75565}

DEPS

@@ -92,7 +92,7 @@ deps = {
   'base/trace_event/common':
     Var('chromium_url') + '/chromium/src/base/trace_event/common.git' + '@' + 'd5bb24e5d9802c8c917fcaa4375d5239a586c168',
   'build':
-    Var('chromium_url') + '/chromium/src/build.git' + '@' + '3cf06a3cf2afdbd2b45bed689f40092d5abae859',
+    Var('chromium_url') + '/chromium/src/build.git' + '@' + 'a0862c377d884cb990d82fbc4ad9bd6328784700',
   'buildtools':
     Var('chromium_url') + '/chromium/src/buildtools.git' + '@' + 'fd3f3c19981cd8fe4e4f11e0a7b8fb6cf329807e',
   'buildtools/clang_format/script':