Update V8 DEPS.

Rolling v8/build to 407cc11c28aef092dc961ff15e5530f50d235000

Rolling v8/tools/swarming_client to 380e32662312eb107f06fcba6409b0409f8fef72

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

Review-Url: https://codereview.chromium.org/2304793002
Cr-Commit-Position: refs/heads/master@{#39113}

DEPS

@@ -8,7 +8,7 @@ vars = {
 
 deps = {
   "v8/build":
-    Var("git_url") + "/chromium/src/build.git" + "@" + "87f8ed60519428c429030cd9ccb3feaf9f616881",
+    Var("git_url") + "/chromium/src/build.git" + "@" + "407cc11c28aef092dc961ff15e5530f50d235000",
   "v8/tools/gyp":
     Var("git_url") + "/external/gyp.git" + "@" + "702ac58e477214c635d9b541932e75a95d349352",
   "v8/third_party/icu":
@@ -26,7 +26,7 @@ deps = {
   "v8/third_party/markupsafe":
     Var("git_url") + "/chromium/src/third_party/markupsafe.git" + "@" + "484a5661041cac13bfc688a26ec5434b05d18961",
   "v8/tools/swarming_client":
-    Var('git_url') + '/external/swarming.client.git' + '@' + "e4288c3040a32f2e7ad92f957668f2ee3d36e5a6",
+    Var('git_url') + '/external/swarming.client.git' + '@' + "380e32662312eb107f06fcba6409b0409f8fef72",
   "v8/testing/gtest":
     Var("git_url") + "/external/github.com/google/googletest.git" + "@" + "6f8a66431cb592dad629028a50b3dd418a408c87",
   "v8/testing/gmock":