Update V8 DEPS.

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/b99a3be..5dd1782

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/3d3532b..6783233

TBR=machenbach@chromium.org,tmrts@chromium.org

Change-Id: I4872aa1ed13a08e257d7f722c8f0348df943b9c2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1779633Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#63489}

DEPS

@@ -72,7 +72,7 @@ vars = {
 
 deps = {
   'v8/build':
-    Var('chromium_url') + '/chromium/src/build.git' + '@' + 'b99a3be8fa28f380f74a2fbd56575a004a627b25',
+    Var('chromium_url') + '/chromium/src/build.git' + '@' + '5dd17829f4f8f272328df47f6fc1793dcf5d9650',
   'v8/third_party/depot_tools':
     Var('chromium_url') + '/chromium/tools/depot_tools.git' + '@' + '355e97e300e8baceae8353287ad59b915dbb8196',
   'v8/third_party/icu':
@@ -216,7 +216,7 @@ deps = {
       'dep_type': 'cipd',
   },
   'v8/tools/clang':
-    Var('chromium_url') + '/chromium/src/tools/clang.git' + '@' + '3d3532b518142db233ad6126ec597363feb550b2',
+    Var('chromium_url') + '/chromium/src/tools/clang.git' + '@' + '6783233c4afd00711361a1c43469659d1c393123',
   'v8/tools/luci-go': {
       'packages': [
         {