Update V8 DEPS.

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/3e739fd..769428e

Rolling v8/third_party/catapult: https://chromium.googlesource.com/external/github.com/catapult-project/catapult/+log/84a7af6..71c4c9a

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

Change-Id: I238047fb122635854895bc7a6cc3c5fae9c00790
Reviewed-on: https://chromium-review.googlesource.com/445456Reviewed-by: v8 autoroll <v8-autoroll@chromium.org>
Commit-Queue: v8 autoroll <v8-autoroll@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43337}

DEPS

@@ -8,7 +8,7 @@ vars = {
 
 deps = {
   "v8/build":
-    Var("chromium_url") + "/chromium/src/build.git" + "@" + "3e739fd08b3eb4f63d2039f5d3d9908f8c827491",
+    Var("chromium_url") + "/chromium/src/build.git" + "@" + "769428e39e494aafa6b65126579fa59df875826d",
   "v8/tools/gyp":
     Var("chromium_url") + "/external/gyp.git" + "@" + "e7079f0e0e14108ab0dba58728ff219637458563",
   "v8/third_party/icu":
@@ -48,7 +48,7 @@ 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" + "@" + "84a7af661032933b0bd10cdc1f656cdf6b6781c3",
+      Var('chromium_url') + "/external/github.com/catapult-project/catapult.git" + "@" + "71c4c9aba898fe6d112646d549cb94de1b41a54f",
   },
   "win": {
     "v8/third_party/cygwin":