Update V8 DEPS.

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/03bbc87..dd6b994

Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/7b7eb88..2d0e03c

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

Change-Id: I6a9b88a4fe1b419fdca0f57848b680aea861a1e7
Reviewed-on: https://chromium-review.googlesource.com/1189423
Commit-Queue: V8 Autoroller <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Reviewed-by: V8 Autoroller <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#55419}

DEPS

@@ -13,11 +13,11 @@ vars = {
 
 deps = {
   'v8/build':
-    Var('chromium_url') + '/chromium/src/build.git' + '@' + '03bbc870bf80775a21c613a19b041e78eb334c65',
+    Var('chromium_url') + '/chromium/src/build.git' + '@' + 'dd6b994b32b498e9e766ce60c44da0aec3a2a188',
   'v8/tools/gyp':
     Var('chromium_url') + '/external/gyp.git' + '@' + 'd61a9397e668fa9843c4aa7da9e79460fe590bfb',
   'v8/third_party/depot_tools':
-    Var('chromium_url') + '/chromium/tools/depot_tools.git' + '@' + '7b7eb8800be040d4405fe1d04f002ad1f3a5a38f',
+    Var('chromium_url') + '/chromium/tools/depot_tools.git' + '@' + '2d0e03cb5ddc5faef4d7bbd54d0177885d3975bc',
   'v8/third_party/icu':
     Var('chromium_url') + '/chromium/deps/icu.git' + '@' + 'a191af9d025859e8368b8b469120d78006e9f5f6',
   'v8/third_party/instrumented_libraries':