Roll buildtools/ 893aa038d..c2e479566 (6 commits)

https://chromium.googlesource.com/chromium/src/buildtools.git/+log/893aa038dd17..c2e479566081

Include modification to split mac clang-format.sha1 handling into
separate x64/arm64 rules, per instructions in https://crrev.com/983388.

Created with:
  roll-dep buildtools

Change-Id: Ia2b9e97095d6a586cb8792300e7d2e8c62e9643c
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/92596
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Alan Screen <awscreen@chromium.org>
diff --git a/DEPS b/DEPS
index af0d187..decac00 100644
--- a/DEPS
+++ b/DEPS
@@ -41,7 +41,7 @@
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling buildtools
   # and whatever else without interference from each other.
-  'buildtools_revision': '893aa038dd17d05f3c5ff5af98daebabc294a948',
+  'buildtools_revision': 'c2e4795660817c2776dbabd778b92ed58c074032',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling catapult
   # and whatever else without interference from each other.
@@ -445,15 +445,29 @@
     ],
   },
   {
-    'name': 'clang_format_mac',
+    'name': 'clang_format_mac_x64',
     'pattern': '.',
-    'condition': 'host_os == "mac"',
+    'condition': 'host_os == "mac" and host_cpu == "x64"',
     'action': [ 'python3',
                 'third_party/depot_tools/download_from_google_storage.py',
                 '--no_resume',
                 '--no_auth',
                 '--bucket', 'chromium-clang-format',
-                '-s', 'buildtools/mac/clang-format.sha1',
+                '-s', 'buildtools/mac/clang-format.x64.sha1',
+                '-o', 'src/buildtools/mac/clang-format',
+    ],
+  },
+  {
+    'name': 'clang_format_mac_arm64',
+    'pattern': '.',
+    'condition': 'host_os == "mac" and host_cpu == "arm64"',
+    'action': [ 'python3',
+                'src/third_party/depot_tools/download_from_google_storage.py',
+                '--no_resume',
+                '--no_auth',
+                '--bucket', 'chromium-clang-format',
+                '-s', 'src/buildtools/mac/clang-format.arm64.sha1',
+                '-o', 'src/buildtools/mac/clang-format',
     ],
   },
   {