roll: third_party/pigweed b4a0ee4..2c5e7fa (5 commits)

2c5e7fa:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/271852 pw_allocator: Restore Deallocator::WrapUniqueArray
03d757d:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/271681 pw_env_setup: Reorder args to cipd
30e3d13:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/271435 pw_presubmit: Get black config from file's parents
796b62d:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/271434 pw_cli: Add helpers for looking up config files
b599ed3:https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/271792 pw_assert: Mark :pw_assert deprecated

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: b4a0ee4f9fff86..2c5e7fae20bec8
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8721733051135035921
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I7266200101e8d8874f91d110b5bf6b148cab853e
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/examples/+/271637
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index b4a0ee4..2c5e7fa 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit b4a0ee4f9fff861c1137ae84e8100c24381ccba1
+Subproject commit 2c5e7fae20bec82836f8f1bdc056efbc1ce98478