Update V8 DEPS.

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/4be574d..ebd17dd

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

Change-Id: I87a2e6e391caacf4477b95da9bec9dd6e69285b2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1607681Reviewed-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@{#61431}

DEPS

@@ -57,7 +57,7 @@ vars = {
 
 deps = {
   'v8/build':
-    Var('chromium_url') + '/chromium/src/build.git' + '@' + '4be574dbbed72d8db83dd92efab6685f32c33578',
+    Var('chromium_url') + '/chromium/src/build.git' + '@' + 'ebd17ddb44b266bb051a34bb15a5d6d14e17d047',
   'v8/third_party/depot_tools':
     Var('chromium_url') + '/chromium/tools/depot_tools.git' + '@' + 'cd862e37ea2953271923618ba5321c794b74867b',
   'v8/third_party/icu':