Update V8 DEPS.

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/c97da98..b656b39

TBR=machenbach@chromium.org,tmrts@chromium.org,v8-waterfall-sheriff@grotations.appspotmail.com

Change-Id: I9d81d498321fe94d55f2b0eec45c10ef1cdc7f0c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2370823Reviewed-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@{#69529}

DEPS

@@ -82,7 +82,7 @@ vars = {
 
 deps = {
   'build':
-    Var('chromium_url') + '/chromium/src/build.git' + '@' + 'c97da98a7a30284e3e6f2a08e4ba82f1f6d2ba44',
+    Var('chromium_url') + '/chromium/src/build.git' + '@' + 'b656b396b62d9e52eba121239af29941977d5e23',
   'third_party/depot_tools':
     Var('chromium_url') + '/chromium/tools/depot_tools.git' + '@' + '490961030b55067d50c87e2125c631f5078332a0',
   'third_party/icu':