Roll buildtools to 535aff2 to get GN 307087

Includes --dry-run.

[email protected]
BUG=439591

Review URL: https://codereview.chromium.org/781173002

Cr-Commit-Position: refs/heads/master@{#307123}
diff --git a/DEPS b/DEPS
index c32969e6..5a84035e 100644
--- a/DEPS
+++ b/DEPS
@@ -64,7 +64,7 @@
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling build tools
   # and whatever else without interference from each other.
-  'buildtools_revision': 'af2cab762e6de03ee53ba430a596ad98d5006778',
+  'buildtools_revision': '535aff24c308a715751028173e569596bcfe12a7',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling PDFium
   # and whatever else without interference from each other.