Update V8 DEPS.

Rolling v8/build to dfb08d9b315caad762d458ff3ed828e792913df3

Rolling v8/tools/clang to 6b75002bcce135ecacc1ff5a7fdb2f0647212198

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

Review-Url: https://codereview.chromium.org/2354613004
Cr-Commit-Position: refs/heads/master@{#39524}

DEPS

@@ -8,7 +8,7 @@ vars = {
 
 deps = {
   "v8/build":
-    Var("git_url") + "/chromium/src/build.git" + "@" + "cce8ee87cfdbbac3b05240132f74fe1f398e83d1",
+    Var("git_url") + "/chromium/src/build.git" + "@" + "dfb08d9b315caad762d458ff3ed828e792913df3",
   "v8/tools/gyp":
     Var("git_url") + "/external/gyp.git" + "@" + "702ac58e477214c635d9b541932e75a95d349352",
   "v8/third_party/icu":
@@ -41,7 +41,7 @@ deps = {
   "v8/test/test262/harness":
     Var("git_url") + "/external/github.com/test262-utils/test262-harness-py.git" + "@" + "cbd968f54f7a95c6556d53ba852292a4c49d11d8",
   "v8/tools/clang":
-    Var("git_url") + "/chromium/src/tools/clang.git" + "@" + "bd7e80b254a93d0a5cd8ecb994e47b1c827e253c",
+    Var("git_url") + "/chromium/src/tools/clang.git" + "@" + "6b75002bcce135ecacc1ff5a7fdb2f0647212198",
 }
 
 deps_os = {