roll: gn

From: git_revision:3f916fba5b355be8d80ead6a2d2eaaf777736731
To: git_revision:6a6163c80141d0173cb6a82489f3fc1a4ad2c3d7

CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Iea4e8af44c20fc3b04f39f1690c1b5b3ad665638
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 acfe21b..27dd22b 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
@@ -2,7 +2,7 @@
   {
     "path": "gn/gn/${platform}",
     "tags": [
-      "git_revision:3f916fba5b355be8d80ead6a2d2eaaf777736731"
+      "git_revision:6a6163c80141d0173cb6a82489f3fc1a4ad2c3d7"
     ]
   },
   {