Update V8 DEPS.

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/1c66ba1..3dd2b5f

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

Change-Id: I345def7a1ade64accc9570b8c8af6f0514058da1
Reviewed-on: https://chromium-review.googlesource.com/763130Reviewed-by: v8 autoroll <v8-autoroll@chromium.org>
Commit-Queue: v8 autoroll <v8-autoroll@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49288}

DEPS

@@ -9,7 +9,7 @@ vars = {
 
 deps = {
   'v8/build':
-    Var('chromium_url') + '/chromium/src/build.git' + '@' + '1c66ba19cf35b63b0694717ffa7a6e24ebb9409f',
+    Var('chromium_url') + '/chromium/src/build.git' + '@' + '3dd2b5f409055781080dac9b6d89437f6d25dea1',
   'v8/tools/gyp':
     Var('chromium_url') + '/external/gyp.git' + '@' + 'd61a9397e668fa9843c4aa7da9e79460fe590bfb',
   'v8/third_party/icu':