Update V8 DEPS.

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/824d0c1..c5d82db

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

Change-Id: I7c4bbc126a7d3322a836562684e466bf2a667747
Reviewed-on: https://chromium-review.googlesource.com/742805Reviewed-by: v8 autoroll <v8-autoroll@chromium.org>
Commit-Queue: v8 autoroll <v8-autoroll@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49020}

DEPS

@@ -9,7 +9,7 @@ vars = {
 
 deps = {
   'v8/build':
-    Var('chromium_url') + '/chromium/src/build.git' + '@' + '824d0c179bbeeca7991230217df4cfe4507adf85',
+    Var('chromium_url') + '/chromium/src/build.git' + '@' + 'c5d82db641443ef987c0e00d650f6b4a08c0876c',
   'v8/tools/gyp':
     Var('chromium_url') + '/external/gyp.git' + '@' + 'd61a9397e668fa9843c4aa7da9e79460fe590bfb',
   'v8/third_party/icu':