Update V8 DEPS.

Rolling v8/build to b81f2a05b5aa7f5b6cf843380eb276897b1ef626

Rolling v8/tools/clang to afdc842603935f994788bf2388e1155528448b2a

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

Review-Url: https://codereview.chromium.org/1961653002
Cr-Commit-Position: refs/heads/master@{#36092}

DEPS

@@ -8,7 +8,7 @@ vars = {
 
 deps = {
   "v8/build":
-    Var("git_url") + "/chromium/src/build.git" + "@" + "119d5305247498fdd8a215b8e2b6c50223ac7d4b",
+    Var("git_url") + "/chromium/src/build.git" + "@" + "b81f2a05b5aa7f5b6cf843380eb276897b1ef626",
   "v8/tools/gyp":
     Var("git_url") + "/external/gyp.git" + "@" + "02b145a1a4f4e1c62e8bae06045caf852d9ef17f",
   "v8/third_party/icu":
@@ -31,7 +31,7 @@ deps = {
   "v8/test/test262/data":
     Var("git_url") + "/external/github.com/tc39/test262.git" + "@" + "9c45e2ac684bae64614d8eb55789cae97323a7e7",
   "v8/tools/clang":
-    Var("git_url") + "/chromium/src/tools/clang.git" + "@" + "0bb0462a91310d88ab9d124d8db54a70c9e1d1b0",
+    Var("git_url") + "/chromium/src/tools/clang.git" + "@" + "afdc842603935f994788bf2388e1155528448b2a",
 }
 
 deps_os = {