Update DevTools DEPS (trusted)

Rolling buildtools: https://chromium.googlesource.com/chromium/src/buildtools/+log/88a3274..fe8567e

Roll created at https://cr-buildbucket.appspot.com/build/8702484774267632353

Bug: none
Change-Id: I76154aa4002854cf3737e0c4fd2d02614c9cace7
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6990916
Commit-Queue: Devtools Autoroller <devtools-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Bot-Commit: Devtools Autoroller <devtools-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>

Author: devtools-ci-autoroll-builder

DEPS

@@ -15,7 +15,7 @@ vars = {
   'build_revision': 'dd54bc718b7c5363155660d12b7965ea9f87ada9',
 
   'buildtools_url': 'https://chromium.googlesource.com/chromium/src/buildtools.git',
-  'buildtools_revision': '88a3274e7b0c6314c84ed202ee6377d1cf9e22b0',
+  'buildtools_revision': 'fe8567e143162ec1a2fc8d13f85d67a8d2dde1b7',
 
   'depot_tools_url': 'https://chromium.googlesource.com/chromium/tools/depot_tools.git',
   'depot_tools_revision': '73e46667ed3a1326cf564747737b4e11137d7f29',