Update V8 DEPS.

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/9ed5110..9e80056

Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/71bae22..e9e89e3

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

Change-Id: I1d682a1b5ea7121f431366f1b65d05252c50e78a
Reviewed-on: https://chromium-review.googlesource.com/c/1498693Reviewed-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@{#59991}

DEPS

@@ -16,9 +16,9 @@ vars = {
 
 deps = {
   'v8/build':
-    Var('chromium_url') + '/chromium/src/build.git' + '@' + '9ed511087c03666dc1816bef412012f067de6f69',
+    Var('chromium_url') + '/chromium/src/build.git' + '@' + '9e80056b6924ef40c5f4b52638e23e2665aaf787',
   'v8/third_party/depot_tools':
-    Var('chromium_url') + '/chromium/tools/depot_tools.git' + '@' + '71bae22f623ebe9ccf013b22497dae6177dec90a',
+    Var('chromium_url') + '/chromium/tools/depot_tools.git' + '@' + 'e9e89e3aa538298f77e98da01bc36416118e9e88',
   'v8/third_party/icu':
     Var('chromium_url') + '/chromium/deps/icu.git' + '@' + '8c67416ccb4da42d817e7081ff83a2193b1aabe7',
   'v8/third_party/instrumented_libraries':