[third_party/pigweed] Roll 2 commits

88cc39c75cffbcd pw_env_setup: Update CIPD client version
fa9415d6bb8d280 pw_presubmit: Remove test_python_packages

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: e40d076c94b1268..88cc39c75cffbcd
Roller-URL: https://ci.chromium.org/b/8837704865936169921
Cq-Cl-Tag: roller-builder:pigweed-sample-project-roller
Cq-Cl-Tag: roller-bid:8837704865936169921
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I5c44fc629ad5844d96ef7a9842a1d07ab874714d
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/sample_project/+/58800
Bot-Commit: 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 e40d076..88cc39c 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit e40d076c94b126880d58c6762938a7bf487a4b4b
+Subproject commit 88cc39c75cffbcdb2c71468763ed8b44c3837234