[roll third_party/pigweed] pw_env_setup: Get buildifier from CIPD

Also assume it's present in pw_presubmit.

Original-Bug: 191
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/57346

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: d1a140645f52332..bf0ff834cf9a186
Roller-URL: https://ci.chromium.org/b/8838636724082986208
Cq-Cl-Tag: roller-builder:pigweed-experimental-roller
Cq-Cl-Tag: roller-bid:8838636724082986208
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I9a1d4a9f57c8ea3a70876720784d475ae1737ac7
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/57460
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 d1a1406..bf0ff83 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit d1a140645f52332a78c14b5af51ad455d3d092ed
+Subproject commit bf0ff834cf9a18656571b31bbc2c2f98389997e0