Roll DEPS for build to 891d9357.

Routine roll.
https://chromium.googlesource.com/chromium/src/build/+log/159ee37d..891d9357

TBR=dsinclair@chromium.org

Change-Id: I45a61315694a7e55ed5a29c86303875a8436c3db
Reviewed-on: https://pdfium-review.googlesource.com/20710
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/DEPS b/DEPS
index 6c8bf42..cc8fc13 100644
--- a/DEPS
+++ b/DEPS
@@ -5,7 +5,7 @@
   'pdfium_git': 'https://pdfium.googlesource.com',
 
   'android_ndk_revision': '26d93ec07f3ce2ec2cdfeae1b21ee6f12ff868d8',
-  'build_revision': '159ee37d274d6721eba19158d20b1f4912804880',
+  'build_revision': '891d935708490245d1646782af723f26892bdf62',
   'buildtools_revision': 'f6d165d9d842ddd29056c127a5f3a3c5d8e0d2e3',
   'catapult_revision': 'd624b3ced2c81d4fb4ea98a8dbb4532272cc1e0a',
   'clang_revision': '0235fed9a32f921614500213b8e3fc1a9f1f9bcb',