Update V8 DEPS.

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/2744073..81c2772

Rolling v8/third_party/catapult: https://chromium.googlesource.com/external/github.com/catapult-project/catapult/+log/e9f547b..d49bf81

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

Change-Id: Id67a6e6608c34c753dbeb01852e9b16bc0d6a0a3
Reviewed-on: https://chromium-review.googlesource.com/455660Reviewed-by: v8 autoroll <v8-autoroll@chromium.org>
Commit-Queue: v8 autoroll <v8-autoroll@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43842}

DEPS

@@ -8,7 +8,7 @@ vars = {
 
 deps = {
   "v8/build":
-    Var("chromium_url") + "/chromium/src/build.git" + "@" + "27440731314c34fdb1db777b33d1f88a595a749c",
+    Var("chromium_url") + "/chromium/src/build.git" + "@" + "81c27726998868370c07e59ac1360159ac80ed4d",
   "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" + "@" + "e9f547be045d4e50cb2d4927261d500e425c364c",
+      Var('chromium_url') + "/external/github.com/catapult-project/catapult.git" + "@" + "d49bf818dca5f889f374c841626843ecc785a0c2",
   },
   "win": {
     "v8/third_party/cygwin":