Roll build/ a9b5feb78..a6760f254 (159 commits)

https://chromium.googlesource.com/chromium/src/build.git/+log/a9b5feb7850c..a6760f254296

Created with:
  roll-dep build

Change-Id: I6f42f1c501e7f7fd93c479daf8bda39ad6cc776b
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/93390
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/DEPS b/DEPS
index 938093f..740aa2b 100644
--- a/DEPS
+++ b/DEPS
@@ -37,7 +37,7 @@
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling build
   # and whatever else without interference from each other.
-  'build_revision': 'a9b5feb7850c116807252f9fea99ba6d814c9e1d',
+  'build_revision': 'a6760f254296a27f13a267c6296425382040fba9',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling buildtools
   # and whatever else without interference from each other.