Roll gn from a2e2717ea670 to 88e8054aff7b

https://gn.googlesource.com/gn.git/+log/a2e2717ea670..88e8054aff7b

Change-Id: I4d0387294782b2fa8015d24f3c9146ab6389986f
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/117271
Reviewed-by: Thomas Sepez <tsepez@google.com>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/DEPS b/DEPS
index 63c6cc9..af42fd6 100644
--- a/DEPS
+++ b/DEPS
@@ -109,7 +109,7 @@
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling GN CIPD package version
   # and whatever else without interference from each other.
-  'gn_version': 'git_revision:a2e2717ea670249a34b0de4b3e54f268d320bdfa',
+  'gn_version': 'git_revision:88e8054aff7bd0cb2295c7d9361d2be0b7355f27',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling gtest
   # and whatever else without interference from each other.