roll: gn

From: git_revision:de5a8348b2eef6833146542d8b376e1e79bfeb8b
To: git_revision:c808630cea75d153382df3b29e0ddbc2798e1b4a

Also grab gn on linux-arm64.

Change-Id: I596c0f3483476d471e83c1336e17e4343b326bc3
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/22340
Commit-Queue: Rob Mohr <mohrr@google.com>
Reviewed-by: Wyatt Hepler <hepler@google.com>
diff --git a/pw_env_setup/py/pw_env_setup/cipd_setup/pigweed.json b/pw_env_setup/py/pw_env_setup/cipd_setup/pigweed.json
index 760ba7c..136edf3 100644
--- a/pw_env_setup/py/pw_env_setup/cipd_setup/pigweed.json
+++ b/pw_env_setup/py/pw_env_setup/cipd_setup/pigweed.json
@@ -1,8 +1,8 @@
 [
   {
-    "path": "gn/gn/${os}-${arch=amd64}",
+    "path": "gn/gn/${os}-${arch=amd64,arm64}",
     "tags": [
-      "git_revision:de5a8348b2eef6833146542d8b376e1e79bfeb8b"
+      "git_revision:c808630cea75d153382df3b29e0ddbc2798e1b4a"
     ]
   },
   {