Update V8 DEPS.

DEPS

 # Note: The buildbots evaluate this file with CWD set to the parent
 # directory and assume that the root of the checkout is in ./v8/, so
 # all paths in here must match this assumption.
 
 vars = {
   "git_url": "https://chromium.googlesource.com",
 }
 
 deps = {
   "v8/build":
-    Var("git_url") + "/chromium/src/build.git" + "@" + "2c67d4d74b6b3673228fab191918500a582ef3b0",
+    Var("git_url") + "/chromium/src/build.git" + "@" + "bd9b7568ac244046c38f6c27d686d7661bfd4d27",
   "v8/tools/gyp":
     Var("git_url") + "/external/gyp.git" + "@" + "e7079f0e0e14108ab0dba58728ff219637458563",
   "v8/third_party/icu":
     Var("git_url") + "/chromium/deps/icu.git" + "@" + "b5ecbb29a26532f72ef482569b223d5a51fd50bf",
   "v8/buildtools":
     Var("git_url") + "/chromium/buildtools.git" + "@" + "60f7f9a8b421ebf9a46041dfa2ff11c0fe59c582",
   "v8/base/trace_event/common":
     Var("git_url") + "/chromium/src/base/trace_event/common.git" + "@" + "315bf1e2d45be7d53346c31cfcc37424a32c30c8",
   "v8/platform/inspector_protocol":
     Var("git_url") + "/chromium/src/third_party/WebKit/Source/platform/inspector_protocol.git" + "@" + "f49542089820a34a9a6e33264e09b73779407512",
@@ skipping 217 matching lines @@
     'name': 'clang',
     'pattern': '.',
     'action': ['python', 'v8/tools/clang/scripts/update.py', '--if-needed'],
   },
   {
     # A change to a .gyp, .gypi, or to GYP itself should run the generator.
     "pattern": ".",
     "action": ["python", "v8/gypfiles/gyp_v8"],
   },
 ]