Update V8 DEPS.

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/7a418db..d4321a9

Rolling v8/third_party/catapult: https://chromium.googlesource.com/external/github.com/catapult-project/catapult/+log/fc2f450..53604dd

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/960cc3e..88069f4

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

Review-Url: https://codereview.chromium.org/2669883004
Cr-Commit-Position: refs/heads/master@{#42905}

DEPS

@@ -8,7 +8,7 @@ vars = {
 
 deps = {
   "v8/build":
-    Var("chromium_url") + "/chromium/src/build.git" + "@" + "7a418db114bbc98b1d9b0a67d3b8ec91b8e1a787",
+    Var("chromium_url") + "/chromium/src/build.git" + "@" + "d4321a92c642afc9ed6f4e2b41e158482cebf304",
   "v8/tools/gyp":
     Var("chromium_url") + "/external/gyp.git" + "@" + "e7079f0e0e14108ab0dba58728ff219637458563",
   "v8/third_party/icu":
@@ -39,7 +39,7 @@ deps = {
   "v8/test/test262/harness":
     Var("chromium_url") + "/external/github.com/test262-utils/test262-harness-py.git" + "@" + "0f2acdd882c84cff43b9d60df7574a1901e2cdcd",
   "v8/tools/clang":
-    Var("chromium_url") + "/chromium/src/tools/clang.git" + "@" + "960cc3ec8c679adad9b6f9019f737c8cd9ad0a75",
+    Var("chromium_url") + "/chromium/src/tools/clang.git" + "@" + "88069f4702f5ca12aeb78d953279588ebc3fa975",
 }
 
 deps_os = {
@@ -47,7 +47,7 @@ deps_os = {
     "v8/third_party/android_tools":
       Var("chromium_url") + "/android_tools.git" + "@" + "b43a6a289a7588b1769814f04dd6c7d7176974cc",
     "v8/third_party/catapult":
-      Var('chromium_url') + "/external/github.com/catapult-project/catapult.git" + "@" + "fc2f450c1b33802d3e1b5f5d2cb240e6b501e61f",
+      Var('chromium_url') + "/external/github.com/catapult-project/catapult.git" + "@" + "53604dda661bfae7b4d9d389323efc536bbde463",
   },
   "win": {
     "v8/third_party/cygwin":