Update V8 DEPS.

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/7ec8401..8235ac1

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

Change-Id: I15af028812bd628970f63cc551539e5bb245cd79
Reviewed-on: https://chromium-review.googlesource.com/472487Reviewed-by: v8 autoroll <v8-autoroll@chromium.org>
Commit-Queue: v8 autoroll <v8-autoroll@chromium.org>
Cr-Commit-Position: refs/heads/master@{#44503}

DEPS

@@ -38,7 +38,7 @@ deps = {
   "v8/test/test262/harness":
     Var("chromium_url") + "/external/github.com/test262-utils/test262-harness-py.git" + "@" + "0f2acdd882c84cff43b9d60df7574a1901e2cdcd",
   "v8/tools/clang":
-    Var("chromium_url") + "/chromium/src/tools/clang.git" + "@" + "7ec8401c511c1253fad7e146a71ae6552052edf5",
+    Var("chromium_url") + "/chromium/src/tools/clang.git" + "@" + "8235ac133f988f21adff447d6420870decaf0e72",
   "v8/test/wasm-js":
     Var("chromium_url") + "/external/github.com/WebAssembly/spec.git" + "@" + "002e57c86ccf5c80db0de6e40246665340350c43",
 }