Update V8 DEPS.

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/ca0069e..15a6efa

Rolling v8/third_party/catapult: https://chromium.googlesource.com/external/github.com/catapult-project/catapult/+log/707aaac..19565fd

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

Review-Url: https://codereview.chromium.org/2562213002
Cr-Commit-Position: refs/heads/master@{#41629}

DEPS

@@ -8,7 +8,7 @@ vars = {
 
 deps = {
   "v8/build":
-    Var("chromium_url") + "/chromium/src/build.git" + "@" + "ca0069e34d4f5f2c27b4d69723f61dd0407b60b0",
+    Var("chromium_url") + "/chromium/src/build.git" + "@" + "15a6efac74f792ad77238eb2df60a7f6d607e7ba",
   "v8/tools/gyp":
     Var("chromium_url") + "/external/gyp.git" + "@" + "e7079f0e0e14108ab0dba58728ff219637458563",
   "v8/third_party/icu":
@@ -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" + "@" + "707aaac64b3c0a86d253e1ab502e73996d63927e",
+      Var('chromium_url') + "/external/github.com/catapult-project/catapult.git" + "@" + "19565fdb148afc5fc752516f395f715f5d27c1f1",
   },
   "win": {
     "v8/third_party/cygwin":