roll: third_party/pigweed pw_allocator: FaultInjectingAllocator for testing

Wraps a real allocator and allows users to inject Allocate(), Resize(),
and Reallocate() failures.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/287653
Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
Original-Revision: 6e099413a04b66e31b3a703a7229cf0a180a4387

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 435f8ca9a58e9b..6e099413a04b66
Roll-Count: 1
Roller-URL: https://cr-buildbucket.appspot.com/build/8715424123136126769
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ic20cda14ae0f40f0cb56fee4cfc01c59f3f5bd28
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/289752
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 435f8ca..6e09941 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 435f8ca9a58e9bff5e703fa52ea1519617b6749c
+Subproject commit 6e099413a04b66e31b3a703a7229cf0a180a4387