Update V8 DEPS.

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/c11a9f7..1caf3a6

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

Change-Id: I9f6bc987a022b085a0baaf1eb67ea23fa5513794
Reviewed-on: https://chromium-review.googlesource.com/509232Reviewed-by: v8 autoroll <v8-autoroll@chromium.org>
Commit-Queue: v8 autoroll <v8-autoroll@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45439}

DEPS

@@ -8,7 +8,7 @@ vars = {
 
 deps = {
   "v8/build":
-    Var("chromium_url") + "/chromium/src/build.git" + "@" + "c11a9f7839d170a889e740d366b94ebab9cde85c",
+    Var("chromium_url") + "/chromium/src/build.git" + "@" + "1caf3a69f3b0379c9fef2493aa1b3cda96e17d7b",
   "v8/tools/gyp":
     Var("chromium_url") + "/external/gyp.git" + "@" + "eb296f67da078ec01f5e3a9ea9cdc6d26d680161",
   "v8/third_party/icu":