Update V8 DEPS.

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/de527f4..7dff8d4

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/95f204a..6b794b9

TBR=machenbach@chromium.org,tmrts@chromium.org,v8-waterfall-sheriff@grotations.appspotmail.com

Change-Id: I1e8f66ecd8475053fe710f5e961a727aedb1f3f1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2345610Reviewed-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@{#69298}

DEPS

@@ -82,7 +82,7 @@ vars = {
 
 deps = {
   'build':
-    Var('chromium_url') + '/chromium/src/build.git' + '@' + 'de527f42d39a5cdf39eaa1db3565277016c9d7dc',
+    Var('chromium_url') + '/chromium/src/build.git' + '@' + '7dff8d48fb647492bed34cfd788d3ccaf8e8da4d',
   'third_party/depot_tools':
     Var('chromium_url') + '/chromium/tools/depot_tools.git' + '@' + '0fa91d0f3563276834b632b21d03fc327eff6c9c',
   'third_party/icu':
@@ -250,7 +250,7 @@ deps = {
       'dep_type': 'cipd',
   },
   'tools/clang':
-    Var('chromium_url') + '/chromium/src/tools/clang.git' + '@' + '95f204a687ce875603f3d8a8630427a4e7b149f3',
+    Var('chromium_url') + '/chromium/src/tools/clang.git' + '@' + '6b794b908e719f989cfaff8d5ebaf9b1dc749e7c',
   'tools/luci-go': {
       'packages': [
         {