[roll third_party/pigweed] pw_env_setup: Fix warning when executing bootstrap

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/39882

third_party/pigweed Rolled-Commits: 6fe8ccf0ff7e3a1..0616ee33d584658
Roller-URL: https://ci.chromium.org/b/8851039380123127328
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8851039380123127328
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I25faf39ba71e3082cb5dd77a210f6d9f37948e1b
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/39900
Reviewed-by: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 6fe8ccf..0616ee3 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 6fe8ccf0ff7e3a13ca4abfdd7c6c452b4d7b8f60
+Subproject commit 0616ee33d58465873a8f9ba53ba2f8ac205a8f6b