Update V8 DEPS.

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/4c3ae01..a041d21

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

Change-Id: Ie68dccacbecc99a6de4fdb50b7fd754d84ac60b8
Reviewed-on: https://chromium-review.googlesource.com/c/1438558Reviewed-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@{#59110}

DEPS

@@ -16,7 +16,7 @@ vars = {
 
 deps = {
   'v8/build':
-    Var('chromium_url') + '/chromium/src/build.git' + '@' + '4c3ae0193460de0f9d2c88c659a0df81d68d5193',
+    Var('chromium_url') + '/chromium/src/build.git' + '@' + 'a041d217401076580e70d78b6eb57dfe2678ddc8',
   'v8/third_party/depot_tools':
     Var('chromium_url') + '/chromium/tools/depot_tools.git' + '@' + 'bdb1123726a2810c5f3e28f28f4802fa469e6914',
   'v8/third_party/icu':