[third_party/pigweed] Roll 3 commits

d1841fd3ddeb184 pw_env_setup: Change Bazel library name
68b69d497c6f47a pw_env_setup: Add GitHub environment visitor
994c87cecd4d9c5 third_party/freertos: Add CM3 support to Bazel bui

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 6393be463cc0815..d1841fd3ddeb184
Roller-URL: https://ci.chromium.org/b/8747756064293961473
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I22a06d490e15dc995eca3a423683d7dcf936f671
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/quickstart/bazel/+/210202
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 6393be4..d1841fd 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 6393be463cc08150c06b982b388cfb6481533646
+Subproject commit d1841fd3ddeb1846ce6aeb6bbd09c990e7692a46