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/gyp":
     Var("git_url") + "/external/gyp.git" + "@" + "5122240c5e5c4d8da12c543d82b03d6089eb77c5",
   "v8/third_party/icu":
     Var("git_url") + "/chromium/deps/icu.git" + "@" + "00af1a4e512477e48ba3d5efc97adbc95462685e",
   "v8/buildtools":
-    Var("git_url") + "/chromium/buildtools.git" + "@" + "fa660d47fa1a6c649d5c29e001348447c55709e6",
+    Var("git_url") + "/chromium/buildtools.git" + "@" + "ecc8e253abac3b6186a97573871a084f4c0ca3ae",
   "v8/testing/gtest":
     Var("git_url") + "/external/googletest.git" + "@" + "23574bf2333f834ff665f894c97bef8a5b33a0a9",
   "v8/testing/gmock":
     Var("git_url") + "/external/googlemock.git" + "@" + "29763965ab52f24565299976b936d1265cb6a271",  # from svn revision 501
   "v8/tools/clang":
-    Var("git_url") + "/chromium/src/tools/clang.git" + "@" + "d2b4eddd701ff0265124147bcb0a65f32273f06b",
+    Var("git_url") + "/chromium/src/tools/clang.git" + "@" + "73ec8804ed395b0886d6edf82a9f33583f4a7902",
 }
 
 deps_os = {
   "android": {
     "v8/third_party/android_tools":
       Var("git_url") + "/android_tools.git" + "@" + "ed3dde6470c39b196c70f0c20374894d169754ec",
   },
   "win": {
     "v8/third_party/cygwin":
       Var("git_url") + "/chromium/deps/cygwin.git" + "@" + "c89e446b273697fadf3a10ff1007a97c0b7de6df",
@@ skipping 76 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/build/gyp_v8"],
   },
 ]