Roll third_party/icu/ ae4b77dc8..64e5d7d43 (4 commits)

https://chromium.googlesource.com/chromium/deps/icu.git/+log/ae4b77dc8966..64e5d7d43a1f

Created with:
  roll-dep third_party/icu

TBR=tsepez@chromium.org

Change-Id: Iced59b531a2b2e952cfcd9c1f2dfe5477d757928
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/54917
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
diff --git a/DEPS b/DEPS
index 0bb4480..9844cda 100644
--- a/DEPS
+++ b/DEPS
@@ -22,7 +22,7 @@
   'depot_tools_revision': 'ccd2b4da9a7e6ddf126c0b4437db75201836154c',
   'freetype_revision': '31757f969fba60d75404f31e8f1168bef5011770',
   'gtest_revision': 'f71fb4f9a912ec945401cc49a287a759b6131026',
-  'icu_revision': 'ae4b77dc8966796f0bd93bb6342023276749e148',
+  'icu_revision': '64e5d7d43a1ff205e3787ab6150bbc1a1837332b',
   'instrumented_lib_revision': 'a959e4f0cb643003f2d75d179cede449979e3e77',
   'jinja2_revision': '45571de473282bd1d8b63a8dfcb1fd268d0635d2',
   'jpeg_turbo_revision': '2de84a43e683c2c3c8ff4922da16b9053f024144',