[third_party/pigweed] Roll 2 commits

22961f56a2bdc98 pw_allocator: Various API modifications
96c4cc2fc472b57 bazel: Use pw_facade

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 2f7282802bce209..22961f56a2bdc98
Roller-URL: https://ci.chromium.org/b/8753618176713245393
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: If90a696dc784b134edcedc926a92f47824a01328
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/196195
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 2f72828..22961f5 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 2f7282802bce209fb52c308404e8e7e9f150b476
+Subproject commit 22961f56a2bdc9897d452209429d03655daa006e