Update DevTools DEPS (trusted)

Rolling buildtools: https://chromium.googlesource.com/chromium/src/buildtools/+log/d2159f6..aec4f3c

Roll created at https://cr-buildbucket.appspot.com/build/8696811139941213217

Bug: none
Change-Id: I5ae32b89c2f45e01f853d3b9d0d33b664111eded
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/7211961
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': '1bd2ee1a985e60cd0ea2d44502d3b3d8e1d7456d',
 
   'buildtools_url': 'https://chromium.googlesource.com/chromium/src/buildtools.git',
-  'buildtools_revision': 'd2159f6fbbc8a8d74ecd29d1b44b8d1960228db8',
+  'buildtools_revision': 'aec4f3c79e5af648386819cbe7f6e67206385ece',
 
   'depot_tools_url': 'https://chromium.googlesource.com/chromium/tools/depot_tools.git',
   'depot_tools_revision': '8efa575d754b8703d99b0f827528e45aeaa167aa',