Update V8 DEPS.

Rolling v8/tools/clang to a8288b3f25cdc4e3c3f4dd7ea2f7765ae8847459

Rolling v8/tools/swarming_client to df6e95e7669883c8fe9ef956c69a544154701a49

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

Review URL: https://codereview.chromium.org/1753133002

Cr-Commit-Position: refs/heads/master@{#34418}

DEPS

@@ -16,7 +16,7 @@ deps = {
   "v8/base/trace_event/common":
     Var("git_url") + "/chromium/src/base/trace_event/common.git" + "@" + "e40c41030f44cbd5b6f54081436620f43c3bb08a",
   "v8/tools/swarming_client":
-    Var('git_url') + '/external/swarming.client.git' + '@' + "a72f46e42dba1335e8001499b4621acad2d26728",
+    Var('git_url') + '/external/swarming.client.git' + '@' + "df6e95e7669883c8fe9ef956c69a544154701a49",
   "v8/testing/gtest":
     Var("git_url") + "/external/github.com/google/googletest.git" + "@" + "6f8a66431cb592dad629028a50b3dd418a408c87",
   "v8/testing/gmock":
@@ -29,7 +29,7 @@ deps = {
   "v8/test/test262/data":
     Var("git_url") + "/external/github.com/tc39/test262.git" + "@" + "57d3e2216fa86ad63b6c0a54914ba9dcbff96003",
   "v8/tools/clang":
-    Var("git_url") + "/chromium/src/tools/clang.git" + "@" + "d53e60b4f31f03a6f719b13ed2de7389a4d89be4",
+    Var("git_url") + "/chromium/src/tools/clang.git" + "@" + "a8288b3f25cdc4e3c3f4dd7ea2f7765ae8847459",
 }
 
 deps_os = {