roll: gn

From: git_revision:dba01723a441c358d843a575cb7720d54ddcdf92
To: git_revision:39a87c0b36310bdf06b692c098f199a0d97fc810

CQ-Do-Not-Cancel-Tryjobs: true
Roller-URL: https://ci.chromium.org/b/8846990832544776416
Cq-Cl-Tag: roller-builder:gn-roller
Cq-Cl-Tag: roller-bid:8846990832544776416
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ib720d812c8d52991842b47ff350a8b479b3fd5e5
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/44223
Reviewed-by: Pigweed Roller <pigweed-roller@pigweed.google.com.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed.google.com.iam.gserviceaccount.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 87d1dba..42c14e6 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/${os}-${arch=amd64,arm64}",
     "tags": [
-      "git_revision:dba01723a441c358d843a575cb7720d54ddcdf92"
+      "git_revision:39a87c0b36310bdf06b692c098f199a0d97fc810"
     ]
   },
   {